There should be 3 connections.
1 will be a positive. That goes to the positive on the battery.
1 will be an earth. This should go roughly 12-15 inches from the amp straight to the body of the car.
The final wire is a remote wire which goes to the back of the headunit to switch it on and off with the amp.
Have a read of this buddy.
http://www.torquecars.com/forums/f10...ling-amp-8035/