hey guys been doing some reading on installing my boost gauge but haven't found a thread specifically for a s70. I read that there is already a fire wall pass through and as wondering if this what it?

also is the trim below the steering wheel held on by one screw or is there mor by the hood pop? thanks

 

That rubber thing behind the wires under there? I believe it is but I said screw it and drilled a hole. Im sure i'll be corrected if Im wrong but im pretty sure theres only that one screw right under the wheel, and one plug by the hood pop.