What outlet provisions does your RV have for dumping? If the macerator was mounted to a twist off 3" cap with a dump valve, it's just a matter of twisting on the stinky slinky. If it doesn't have provisions for the slinky, an RV parts store can provide the parts you need.
Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI