fitting backup camera

[Piet]

Hi all, 
my late 2017 XC60, whit sensus, does not have a backup camera. Only the pieps are there. If I fit one and connect it myself, can I than activate the camera in OrBit or is this really dealer work? Dealer said there is some software missing that the have to install.
Is there somebody who knows? Thanks in advance, have nice weekend.

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Could it be just setting “154 front parking camera” to
“ 02 rear parking camera “
or
“ 09 rear parking camera …..activated when reversing”