GBS Plenum

[gncgray 5]

Evening folks

Please excuse the daft question. The welded captive nut on the back of the GBS plenum is a mystery to me. 
 

I wasn’t sure if it was for air temperature or air pressure. 
 

Any help would be appreciated 

Graham 

[DeanRudkin 85]

I believe that is for the air temp when running their recommend omex ecu and loom 

[gncgray 5]

Ta for that. I thought it was but just wanted to check. 

[theduck 841]

It's also not an ideal place for it, so personally would just block it up.