So - the two metal drain nipples are important - one is the tank vent!!! (You absolutely
need that one!) and the other is the scupper drain from the filler neck (to drain water, not just fuel over-fill). They normally have rubber hoses which drain to the ground,
Those nipples screw into tubes which run up through the inside of the tank (when you remove the pump they will be obvious)
It is not uncommon to get perforation in those tubes - I had this myself!!!! - and fuel from the main cell leaks into the tubes and runs out. It really sounds like this was the issue that the PO 'thought' he was fixing.
I fixed mine originally by painting some epoxy over the area on the tube with the hole (I could actually see the hole in my case) - latterly I sealed the entire tank with Caswell Plating Epoxy Tank Liner.
I would suggest you do similar (you can break out a small amount of Caswell for the initial coat on the tubes, before doing the whole tank once it cures) - or get some JB Weld for the initial coat on the tubes, paint it on with a throw-away brush.
When using the Caswell use the whole batch! the suggested 'half' will never cover the whole tank - there is a LOT of surface area in there.
Hopefully he just epoxied the nipples and not into the tubes themselves! If so, they will need to opened up - even if not epoxied, you may still need to push a thin wire or similar through to ensure the tubes are open all the way through.
p.s. if you do a search in this forum (or maybe the Speed Triple forum) on Caswell Plating you will surely find previous threads which have some good pics showing those tubes inside the tank
Edit - here you go