Here is a close up of the power wires connected to the 400.1 amp. In our installation we are using the blue wire as the positive. The silver is the negative that will be connected to the bolt holding the seat in place. The small blue wire in the middle is connected to the remote connection from the head unit. This will tell the amp to turn on when the head unit is powered on.  We have actual in car installation instructions on our site as well. These are intended to help you understand the methods used to power your amps.