Can anyone with a 2014-2017 RLX take some pictures of the electrical plugs for the tail light assembly? I'd like to compare and see if it is the same as the 2018-2020 assemblies. Below are pictures from a showroom 2020.

 

Well if you're in the showroom, why not traipse over to the parts dept and see what they say?

 

Alas, by the time I becumende at the dealership after toil, I could not waltz over to the parts department as they have already ceased operations for the evening.

Given that the assemblies are totally redesigned with the facelift, and as andysinnh mentioned that 2018 and above were all LEDs, the assemblies are incompatible. Regretfully, I may have been ambiguous with my post, as compatibility isn't what I seek. For brevity, for example the Tekonsha's T-connector (part # 118626) prescribed that it is compatible with RLX 2014-2020, yet some other manufacturers' T-connectors demarcates at 2017. Therefore, given how cavernous the rear quarter panels and how accessible the rear tail light assemblies are on the RLX, I assumed there will be helpful members on here who can take pictures of their pre-2018 RLX plugs and share. I beg your pardon for making such careless assumptions.