I fitted similar off ebay -
Only guide that helped was how to replacing a normal bulb on Youtube.
Its not that hard a job, but a bit fiddly - hardest part is stuffing everything back into the space - you pull out the bulb and the connector plugs in, this leaves very little space for the LED assembly.
Seem to recall these were directional with circuit, if they dont work you need to flip the connector.
Only issue is with my side and puddle lights being LED, it makes interior lights look yellow
