2000 Buick Park Avenue Changing lights on Park Ave 2000

Hi I have a Park Ave 2000.
Most of the times the headlight changing in pretty obvious. You take out the bulbs with the wiring from the socket and replace the bulb.
I tried to on my Park Ave 2000 and it looks more complex sort of. There is fluid leveler on top and bunch of complex stuff to open the headlight socket.
I have the tools - how can I approach openening the socket or that is not needed at all to snap off the bulb and put a new one. Any one? Please help
thanks
S