Travelin Lite T6.1 Style LED Lights on a T6?

[Vents]

Hi - bit of a random one - I sold my T6.1 style rear lights (as pictured) and they guy that bought them cannot get them to work on his T6.1. Travelinlite say they're the same. He has the necessary resistor pack fitted etc and I have had them on a T6.1 myself aswell as the T6 pictured - albeit fitted by my bodyshop and not me - do the pins need to be swapped around to make them work on a T6.1? Neither vans are factory LED vans.