Installing Underseat subwoofer

so I’m looking to take on this project. Couple things I’ll have to figure out once I get my hands digging into things, I’ll have to figure out how to run power wire through the firewall. I’m planning to run rcas from my head unit and being ocd, I’ll run it on the opposite side of the power wire. Has anyone done this before? Did they run it through the center under the arm rest console? Also, has anyone dealt working around the vents that are underneath the seats? Has anyone installed it above he vents or just let the vents blow on their device? Any help is appreciated.