A Body Firewall Insulation, HELP! PIC's

You mean the parking brake cable. Looks like thats the parking brake cable that goes thru the round or later teardrop hole.

I'd also be curious what the heck all the perfs are on that smaller triangular shaped outrigger of the brake bracket insulation piece. Those perfs would all be in the accel cable area.

Also looks like in the the bottom piece I have marked 74 DUST, the teardrop hole has a factory slit. Like the parking brake cable was installed FIRST, then the insulation was put in place.