mate best advice is that, try not to give them any change of double defecting you or not passing you just because you have a sub in the boot....i always removed that all stuff.....just try and tidy the wires up and electrical tape them etc.....good luck
look up in the DIY section adam.....guess there would be a thread there about it mate.....but i am guessing it just goes in normally...one line for the actuator and another line from the IC piping