Hi,
I want to fit a boost gauge in one of my interior heater vents but am unsure if its ok to do

The car is a s2 erst and I want to take out the right side vent from the center console.
My question is this, will it matter once I have fitted the gauge that the hot air will still be trying to come out of that vent, I'd imagine the gauge & the wiring would get quite hot ! What have other people done to overcome this problem ?
cheers, Duncan