so i'm installing my buddies system in a mercury sable 2000 i think and were using his stock deck. now when installing his amp we've bought some little yellow box to enable us to do so we connected it to the rear speakers accordingly and now we need to know where to put the REM wire. not to sure where it goes too. thanks a lot

 

Jst run it to a 12volt source in the fuse box that gets power when the key is turned on.