Wiring access through firewall

[360joules]

Hi all,

I'm in the middle of a radio installation (HAM radio) and am a little nervous about drilling a hole in the firewall to route the wiring through. Does anybody know if an access hole already exists that can be used? Or of a safe place to drill that won't result in a problem?

Thanks!

[360joules]

Got a reply at NASIOC.... turns out that there's a plug above the brake pedal.