Man - this one is a booger to get installed. I did one of these on my 2024 Subaru Crosstrek and that one was a lot easier to install. If you have hands of anything larger than a small child you are going to struggle. IMO here is what you need to do if you have the amp as shown in the video.
Forget getting two hands back in there, you will just frustrate yourself. I had to go back about 6 times to get this done - otherwise you will want to break something as your frustration builds. The frustration is NOT with the start/stop eliminator, it is with the absolute MORON that designed a plug that can not be reached. Any designer should be made to work in the service department as their first job so they can appreciate that someone has to work on the things they design, and when you make something that is damned near impossible to get at, they should be dealt with.
So how do you get this booger unplugged? This is just how I did it. Get a long flat blade screwdriver and get the tip wedged between the top of the plug and the socket, then with the other hand, get it snaked in there so you can press teh button on the clip, then twist the screwdriver to pop the clip/plug free.
If you pull from the plug area, you run the risk of pulling the wires out of the plug. Just get in there are try many things until you get it. Like me you may have to drive with it disassembled for a while until you figure it out.
It actually works like a champ once you get it installed. It is so worth the effort of getting this thing in there
What I have noticed is that the cars know the last setting and they are running some check to reset it back to off. All this thing is doing is to prevent that reset sequence from executing - brilliant