driver side of firewall a black rubber grommet, just take a flat head screw driver and poke it threw a couple timeson the edge there is about an inch of wires right in the middle so just go to either side and poke right threw it, thats how i run all wires when i do car audio or alarm stuff, im a 12v tech. this what i do.. u wont have any problems... plus when the wires get threw the rubber will squeeze ur wires and its pretty damn water proof, when u have the hole poked take the wires and bend them over the head of the flat head and take it with electrical tape and poke it threw and go under ur dash and ull see it poken threw behind the fuse box and just grab it and pull em threw.... long flat head will work the best so u dont fight the tape on the screw driver should just slide off.