Bobb

Help!
I’m trying to refit the master cylinder, which I should never have taken off in the place, but that’s another story.
How do I get the plunger pin back in?
I’ve tried from the top and it’s too small a hole and just too fiddly.
I’ve tried from inside the car but I need to be a contortionist, which I’m not.
Have I missed something?
Do I have to disconnect the pedal, or just try harder?
Many thanks
Bob