I have developed a retrofit harness for fitting facelift Mk7.5 non-dynamic tail lights to the Mk7 (cars with factory halogen tail lights only). These literally just plug into the inner and outer tail light, then plug together.
Mk7 Golf (Halogen) To Mk7.5 Dynamic Tail Light Retrofit Wiring Loom Adapters Kit
VVORHSBELL Cold Air Intake Kit Compatible with EA211 1.4 TSI TFSi Audi A3 8V 1.4 TFSi Volkswagen Golf Mk7 Mk7.5 (up to 2021) GTI SportWagen 1.4 TSI Seat Leon Mk3 Skoda Octavia Mk3 SuperbEngine
Heater / Blower Resistor fits VW GOLF Mk7, Mk7 GTI 12 to 21 Regulator Rheostat
FITS Mk7 Golf Front Badge 2013 to 17 Silver / Black
For VW Audi 10 Pin plug Halogen To 14 Pin Plug Xenon Headlight Harness Adapter
Original E81 E82 E87 E88 HALOGEN TO XENON Retrofit Harness *BEST HARNESS*