I have installed my self it is grip to grip ,you need one extra wire which goes from Cruise switch to main CPU ,generally in fitting people go for simple wire and in switch they just insert it desi tareeqa ,the party i have installed was little expensive but they have a proper wire with connection (it was basically a plug and play) one joint they added was in there own wire and that it ,No damage or alteration to any company wires ,Using it for last 5 months now and it is working fine