Hi jakec,
Those are the clips I was thinking of.
1. Place the head light into the ring.
2. Place one end of the W-clip under the inner ridge of the headlight ring.
3. The middle straight bar bit goes against the headlight
4. Place (needs a little bit of force) the other end of the w-clip under the inner ridge of the ring.
Much, much harder to describe than a 5 second video lol

Cheers Geoff