I've ordered some for a Tiguan, so when my tarraco arrives, I'll be able to let you all know. It's just a way to save some money on the flaps. Cheapest set of 4 for Tarraco is £85 del. I've bought some fitted (not universal) China made ones for a Tiguan for less than a 1/4 of that. Worth a punt to save some money.
Yep as Mcsimmo said is electric but you still need to use your foot or hand to lock into place.
The switch is on the left in the boot.
I do find the tow ball is very close to the car but I have tried it and my caravan hitch is fine with a 10mm clearance.