So my truck has rail pressure gauge that is 100% working and then my fuel pressure gauge isnt. from what I have seen im going to need a banjo bolt and the sensor, and then tap them into the cp3 is this correct? I also have an airdog II on the truck. Will that matter where I tap in with the banjo bolt? Now for the wires I have two sets under the hood one has two wires with female electrical connectors. Then another with three wires. Not sure that one would be for the fuel pressure sensor. Any help would be awesome!
heres a pic of the 3 wire

two wire

 

You can put a t fitting in the cp3 supply line and either run a mechanical or sensor from there!