And then the hard part is compressing the stupid spring and trying to stuff the whole mess back in. Just get it lined up and it goes right in. Takes a little practice to do but it will come to you. Can be very frustrating at first.
If we were born with a third hand, it'd probably be easier. Sometimes a special tool or "jig" is made and other times it's the technique - it pays to watch the assembler do it with their ordinary tools.