Hehe... Theres a special tool required for that.
I went through 3 of those damn pins before I figured that one out!!!And if this is you "first time" do it in a large clear plastic bag so you don't loose the detent and or pin when you slip
After a biuld or two, this becomes easy.
Probably equal effort and expense to just order the special tool. I forgot what i paid for mine.dont need to buy the special tool.
you can make it.
a dowel from the hardware store works fine.
drill a little hole in it.
I ended up having my wife hold it with a set of angled craft tweezers. it worked. extra hands make the difference