I'm wondering how the fitting managed to get broken in the first place! I'm betting they connected the hose to the box drain at the factory before they put the cap on. Then they connect it to the thru hull fitting thru the pie plate at the aft end of the walk around.
I don't think I can reach the drains by going thru the forward pie over the fuel tank. I think the stringer is in the way. Butof course I've never tried.