Probably asked before but looking straight into the socket, is high beam on the left or the right. Wire colors are hopelessly faded. View attachment 585368
Yes, the pin placement makes them "idiot proof" but I was doing a bit of blind wiring with old loom that had no colors left and was trying to figure out what to plug into what with no colors for clue.
to be honest and i'm not exaggerating and mean no disrespect, but the answer is that it's so trivial to determine it empirically that it doesn't bear remembering which way is the right way, IMO.