Now to free the bulb itself
this is retained by a double spring loaded clip which is biased to be always spring closed and clamping the bulb in place (unlike the Headlamp bulb which is "hooked shut")
From this you need to open one wire up at a time using finger pressure ease the wire back until you feel resistance there are 2 plastic posts cast in the back of the lamp to retain the spring clip (one on each side of the bulb) to enable you to get the bulb out (i have coloured one in on paint to highlight it)
do one at a time
then you end up with this