I just hardwired mine because I got a HKS turbo timer that had the plug cut off for free... its really not that big of a deal, just wire it between the actual ignition switch and the plug at the end of that harness and you can always go to the junkyard and get a new one for like $5 if you dont want it later. I think I actually have an extra one you could have if you wanna have some fun and be cheap.