Im adding a second amp to my system in my 94 firebird and relocating the wiring that from the old setup (the previous setup had the power cable running from the trunk, alongside the driver seat thru the firewall, across the engine to the battery on the passenger side). I'm replacing the power cable but ive run into a problem. The new power cable is not long enough to come from the driver side so obviously i will need to run the cable along the passenger side, but i dont know exactly where I should drill thru the firewall to get into the engine bay. So my question is where should I place the hole?

 

don't drill anything, unbolt the ECM, run it through the grommet

 

\thats what i did....two bolts hold the ECM together....just punch a hole in the rubber grommet and send it thru