Job done!
I had to step up myself. Got to market, got hold of a general electrician and got it through him. I guided him which cable to connect with which wire. Till very last minute, he had no clue what is going on. 
He did a clean job for me and now understands the process.
Push button has been installed over keyhole giving me exactly original OEM fitting look.
Here are electrician contact details in case someone needs his services.
Blue Star Autos
Arif Javed
0334-3062560
0341-2540704
Dhoraji Link Tippu Sultan Road