I finally got around to getting the connection to be able to dump at home using a garden hose in a drain or toilet. I thought I'd share the part numbers and give a visual incase anyone else is wanting to do this.
Its pretty simple once you have the parts together and only about 6 bucks. I haven't glued mine permanent although you could easily do that but I just secure the connection with duct tape to not restrict it any for everyday dumping. When home I just slide it into the 90deg output at the macerator hose and tape it to secure into place, then attach a garden hose.
I got all the parts at Lowes but probably available at most Hardware Stores:
WATTS Garden Hose Adaptor LFA-663 3/4" MH x 1/2"MIP(Lowes part #416825) -$3.96
LASCO 439-101RMC SCH 40 Bushing Threaded 3/4 x 1/2(51275) -$0.89
3/4" SCH40 Adaptor 4350(23862) - $0.56