Not really that different from standard TT. make sure sewer hose is secure in drain. Then twist and lock sewer hose to black valve. Use disposable gloves. When all is set up, pull valve open and drain - takes about a minute. When "flow" has stopped, insert flush wand from up top and run water thru for a minute or two. Then close valve and walk the hose to remove the remaining water in sewer hose. All done.
Get some "drop ins" for Wally World. It will make life smell alot better.
Here are links to the above products that help in draining the grey water. This way you don't have to hold the hose when draining.
Camco 39533 RV Sewer Hose Rinse Cap
Valterra T01-0091VP 1-1/2" x 3/4" 90° Drain Connector
You should really be more concerned about your grey tank usage. 12 gallons in grey water goes FAST.
2014 Stealth Evo 2850- "Woodstock"
2011 Toyota Tundra Rock Crawler TRD 5.7- "Clifford"
2013 Honda Accord Coupe V6 w/Track Pack- "Julia"
Just glad to get away