Sik2000T/A

I bought a speedomter recalibrator from a friend of mine that recked his car. It's the type you need to splice some wires in the passenger kick panel. It's a black box that has four wires, red, orange, yellow and black. I know the black is the ground wire, that's pretty much given. The rest I'm not sure. He bought it from RK Sports and didn't do the install or keep the instructions. I have no idea what to cut in to and either does he. Any help would be awesome.