This morning/afternoon I'm installing a fire extinguisher in my car as I plan on doing as much track work as possible this year.

In my old MR2 I had my fire extinguisher bolted to the floor of the passenger's foot well. This is where I want to put it in my WRX.

In the MR2 I drilled holes through the floor well and bolted the bracket in with a nut on the underside of the car.

This is what I'm planning on doing with the WRX. My questions is there anything vital in the floor of the footwell that I could drill through if not careful. Wires etc.

(It's a MY99 GC8 for those of you who don't know me).

Thanks in advance,
Scott