I removed the OEM spots from my 2016 GSLC and refitted them onto my 2018 bike with no issues, just plugged them straight into my new bike.
However I did need to get the dealer to ask the bike’s ECU to recognise the new lamps which took two hours to download, but they did this for free during the 600 mile service.
I had the same OEM spots on my 2014 bike before my 2016, so I’ve had the same lamps on my last 3 GS-LC’s