in the middle of installations

i have put my gauges up already, just didn't connect them yet.... looks great ! hehe.. and it's snowig outside!! freaking cold !!!! bad day for installation !
ok.. here is the question, i am trying to install the tube for the boost gaue, but i can't find a hole to go outside of the car !!! do i need to drill a hole or something?? help plz !!!!!
another question, for the a/f gauge, i am trying to hook up the signal line, but it's so so so so short that i can't even get it to the ECU, i can extend the wire, right? but the wire is made out of metal, not copper, is that ok that i use copper wire to connect it?? let me know
thanks !!!
HURRY ! I WANT TO GET IT DONE BY TONIGHT !!