Headlight installation problem, need advice

[sasha055]

Hi

I took out my headlight today.. and when I tried to reinstall it there was a problem..

Blue socket.. the one that plugs into headlight is loose.. and I cann't stick it to the plastic plaque..

Is there something that I'm missing.. how do I attach blue socket to the plaque?
I can reinstall headlight.. but it's not plugged in..

Do I have to somehow plug it in before reinstalling?

Thanks
Sasha