T off of the IM. The gauge should be hooked up the the sender wire on the o2 sensor. you will have to look up which wire it is for you.

 

ok, thanks guys, preciate the help.

i ran the gauge to the white wire on my 02sensor.
havent ran the wastegate to the IM yet, need to get a long enuff vacuum line (im not driving the car anyways, so no rush)
heres a pic....