this is from the seller
Boost gauge comes with its own map sensor that just needs power and ground, you then T into one of the vacuum hoses and run it to the sensor. very simple.
The Shift light comes with a tach adapter that taps into the coil wires for your RPM reference. Again, gauge just needs power and ground.
Air/Fuel comes with it's own oxygen sensor you can install or tap into your existing oxygen sensor wires. Power and ground for the gauge again.