if it is a standard dellorto phbl the things on either side are bowl vents only and not an overflow. no hoses are required but short ones act as mud deflectors. the float arm should be Level with the bowl surface w/ inverted. be sure the floats are not floded and float properly.
the original bolt is kinda special little short 5mm sucker. if it has been hit and damaged the threads, a 6 may have been rigged up. the bolts are inexpensive.
someone may have sprayed some oil in there as a corrosion preventer as they are horrible about letting water in at the cover. if the bikie runs well, start with a good cleanup with some light solvent and inspect the flywheel for up-down movement from loose bearing. if all looks good ride it.
gotta use the galfer pads, run them in for a bit and heat cycle normally, then make about 3-4 high speed stops heating the front and pull out your water bottle to douse them good, should steam off a lot! do that a couple times then let cool and resume normal operation.
