They wanted pics of the two to be taken as the outcome of the event..
So .... was a car actually necessary? what about an isolated godown? or a shanty even in the jungle.
Easier to take pic from outside a shanty or godown... better a godown... say, the place where they were initially.
Why did they move? would't have had questions about how the pic is taken etc. [Still will be odd to have a clear pic w/o flash... but possible in the godown... arguably.]
Edit: But did see a bts where the car was actually in the set. So may be some budgetary constraints in using the godown for so long. 
