The white fitting at the top is the Thetford fitting I must use to connect to the sewer connections on my coach.
I was able to utilize a garbage disposal connector to afix the brass female hose connection (near the switch).
Contractor grade hose
The hose is used to connect the macerator pump to this threaded cleanout fitting shown below.
The ubiquitous sewer cleanout
The hose connected to the pump.
The hose connected to the threaded cleanout connector.