Indicator side repeater removal?

[Geminied]

I've never removed the side repeater before... The Haynes manual says to "Carefully pull the light unit out and withdraw the unit from the wing"
How hard should that be? Mine just don't seem to want to budge and I'm not going to pull too hard for fear of damaging/breaking it. Am I doing something wrong?:(

[Blknight.aus]

theres 2 types one bolts in so you have to remove some bits from the wing to get at it and the other is a press in fit, its easier to remove some bits from the wing and squeeze the pegs together to take them out.