The reservoir appears to be held on by two screws. On close to the fire wall, the other on the fender. There is no screw where the fender is on my car. Is that suppose to be a plastic screw or it it the same screw the attaches to the fire wall? Backstory, I notice a missing screw last night on the PRIUS WINDSHIELD WASHER reservoir last night. Washer is secure but loose.
The above image is not my car but an illustration of what I mean. Btw you can see a bracket in the image and I appear to be missing that too. What does that bracket secure to? Btw, my car is a 2006 Prius.
Not a very critical system... Just secure it as best you can with whatever you got in you spare nuts and bolts drawer... You could even use zip ties...