I just got a new cr v to tow behind my hurricane class a , and am having a problem figuring out how to run the break away switch wiring thru the firewall, it is a small tight area to run the wires , I am not sure whether to drill a hole or if there is an existing hole thru the firewall. I installed a roadmaster bracket and a roadmaster tow bar and purchased a brake buddy. but no info on how other people went through the firewall. any help appreciated. Thanks, Terry