I couldn't get the exact info, still...
It seems that the bike sold as Sprinter in Pakistan, is sold by some other name and style in other(probably South-East Asian) countries. There it is electric start.
On top of the engine housing, on the left side, there is a hump without any reason. If you look from the right side It's clear that's where the Electric starter fits. On the Pakistani model it's sealed and it requires cutting a hole and fitting the starter there.