Power draw and Add-a-Fuses

Hello all,

I have the following accessories currently in my 2012 Prius v:

2x Viofo A119 v3 dashcams

1x Infinity Basslink Mini compact subwoofer with built-in amp
https://www.crutchfield.com/p_108BASSLMI/Infinity-BassLink-Mini.html

For shits & giggles, I'm considering adding two more dashcams to the back corner windows, and also another subwoofer (one is under the passenger seat, so the other would go under the driver's seat).

Now, another subwoofer would only possibly be a challenge based on whether you think that's too much power to ask from a hybrid for that. I do not know what would be "reasonable" here.

For the dashcams though, I have a different issue...I really would prefer to stick with Add-a-Fuses, but here's a picture of what my fuse box already looks like:

It was enough of taking years off the possible longevity of my spine just getting this setup installed and working for the existing two dashcams, but now I'd have to not only fit 4 more Add-a-Fuses [really don't want to splice wires anywhere], but also move these ones to different slots to make them all geometrically fit.

The fuse diagram in the manual doesn't say which slots are always-on or not. Is there a screenshot someone has showing that? don't want to spend two hours twisted like a pretzel with my multimeter and paper, carefully mapping it out.

From there I can hopefully figure out the rest myself. From the angle of the pic, they can't stick off the left side into that white piece sticking down further, and then I don't want any in the right column facing off to the right because then they could brush the e-brake.

And then, of course, considering the recommendation of not using the add-a-fuses in any of the slots for "safety equipment" (airbags, sensors, etc.) per their recommendations.

So what are your thoughts? Two much power draw if added all of these?
(The dashcams have parking mode, but I have their hardwire kits set to shut off at the highest setting of 12.5 volts, so they don't last long. Not relevant here because I haven't found any solution that could support them for the typical 5-8 days the car sits between uses.)

 

"This exact company"? You mean Crutchfield, or the PriusChat store? I'm not seeing anything with a cursory search, and the PriusChat store is down right now (not to mention, the r/Prius subreddit has....less than kind things to say about order fulfillment from the store here).

The Basslink Mini is just a 100w amp powering 6" x 8" subwoofer. So thinking of going from just one of those, to two of them. I bought a cheap decibel meter recently--my usual listening volume is in the 80-85 range, and my max "tolerable" level only pushed it to 90ish. Didn't try to test the limits of the system.
Those weren't stationary readings, mind you--they were at highway speeds where the base was in the neighborhood of 70 dB. do not know if that affects it. I'm not going to any competitions with this stuff.

So, just splitting the existing add-a-fuses (i.e., two dashcams for 1 add-a-fuse) should be safe? Those splices I can handle making. I just didn't know if that'd be too much draw on an individual basis or anything.

 

I mean, I definitely would connect the subwoofer's power to the battery, like I did with the first one. But the dashcams need both an always and a "car on only" supply.

Regardless, I'll be taking Leadfoot's advice and just using the existing Add-a-Fuses for 2 cams each.