how to hook up activated switch to vtec
 

i just bought a 90 crx dx with a 98 d16y8 vtec in it, i don't know how to hook up this black box that he said kicks on the vtec i think its a activated switch or something it has a red,yellow,black,grey and a white wire where do i hook these wires up to ,there is wires already ran from engine into the car the one wire is gold and comes from one of the wires from the distributer and there is a grey wire that come from a sensor on the head i think its what controls the vtec any info greatly appr please help?