Not easy
I did try on my 290 many years ago but can't remember why I gave up
after cutting the hole in the anchor locker platform.
Maybe look into a top on deck windlass with hole for the chain to drop into,sorry I can't help more but I think the one I was using did not fit.
My wife let me sell that boat and buy my H-36 with a windlass built in by
the factory,that and lots of other options and bigger.