Will buying a aftermarket parking aid, but screen is wireless and needs it power from somewhere front. Where would be the best place to take power?

Just above the throttle pedal area (behind the trim) there is a power source 'block' there are 4 IIRC power points far left one as you look at it is a ignition fed supply.

Just above the throttle pedal area (behind the trim) there is a power source 'block' there are 4 IIRC power points far left one as you look at it is a ignition fed supply.

Is there any picture for this?

A quick search of google found this - I think this a Passat one, but it's basically the same (sorry for the poor quality but I blew it up quite a bit)

The one marked 75X (yellow sticker) is the switched live.