the avc/ poston/ quality engineer and precision instruments kits are similar and they followed the gnx design and install when thev built them. they had a plug that just slipped over the oe cluster main harness plug and then tape over and ziptie to keep together ,
the tach lead wire was run direct to the connector under the hood behind alt , (if you had analog you could run to that connector in the dasg but you dont have that connector with digital)
the oil pressure gauge replaces the idiot sender and the output from oil sender is tied to the oil idiot wire that you unplugged ,, this completes the feed to the new cluster
the water temp just replace the coolant idiot lamp switch in the intake with the new sender and connect the old wire to the new sender
the digital has two main connectors (analogs only have one) and to make it plug and play requires some additional wiring to be jumped from the smaller cluster connector to the main connector
if you didnt get one already cut up with the gauge setup youll need to cut out your cluster backer plate (the black plastic behind gauge cluster) to make room for the new cluster gauges
once the backer is out remove the flat plastic wiring harness protector and tape the wires up to protect from rub through
then need to drill a hole through the vent duct behind gauges and sleeve it for the new upper speedometer cable
then if you dont have a bezel already cut youll have to cut yours out and install the plexiglass lens (hope you have the preped bezel or the lens because you wont find one )
lastly youll need to connect the inline vss sender under the hood and run the wires to the oe vss buffer (cut optic end off) ..hope you have that vss sender or you wont have cruise or lockup without it and they arent easy to get these days , if you have XFI there are ways to get the vss for the lockup but you wont have signal for cruise .