These are the version 2 headlights with led DRLs. Managed to get the bulb out (h7), but can't get the new one back in no matter how much I push and twist the thing. Any ideas how to get the flipping thing back in? Attached is the rear of the holder. 

Right, now I've managed to get more light on the subject (pun intended) you have to get the two metal flaps on either side of the holder to clip under the two metal pins. Odd design if you ask me.