If they are electrical you should have a sensor/thermo for the EGT/Oil Pressure, temp, and Boost.
For the EGT, you are going to have to tap one of your exhaust runners. In most cases, your kit should have come with a bung to weld on so you can screw the thermo into it.
Boost is just tapping a vaccum line. The FPR is a good spot, or the brake booster (though that line is huge).
Oil temp/pressure is a bit of a pain though. For pressure you definetly have to either get a sandwhich adapter to go between the block and oil filter, or get a BSPT -> NPT adapter and tap off the stock sensor. Some people tap their oil pan for a temp, but I feel that getting it from the oil filter or block is a more acurate area.
A/F is simply tapping the ECU ground, and the ECU O2 sensor line. Check out Apexi's website under documentation. Their turbo timer has a A/F function, so they have diagrams of what wires would need to be tapped.
Tach is just the distributor, or you could even tap the gauge cluster wire. I beleive mine was a blue wire with silver spots.
never heard of 'em