remote start help

hey guys im not sure if its in the right section or not so ill try
my brother got the remote start taken out of his car and being that i like to rig electronics together im trying to find a way to set it up on my sterio so that i put a button on the remote and it will turn on, the problem is that theres many wires coming out and idk which ones i will need. i just need to wires that so i use those two wires instead of the on off switch. if anyone knows how to do this that would help alot
thanks

i had gone to waal mart one night and walked by the holiday stuff and had seen thath they had a romote thing to blug stuff into and and use a remote to turn it on and off ( i got it for $9.99)