Electric tailgate repair.

Hello,

I have a SS II 2014 Combi 2014 engine 2.0 170 HP.

The car comes from the factory equipped with an electric tailgate on the trunk, but the old owner changed the electric telescopes with simple ones. Now I want to reinstall the electric ones like the car was at the beginning. The tailgate has a soft close, the button on the tailgate works the same as the button next to the DSG shifter.

Please tell me how to proceed, what to do, what to buy to fix this situation. If anyone managed to fix it and has pictures, please help me.

I apologize if my post is not ok.

Thank you!