I have a similar Barker tote and I've only used it once and just rinsed it after I used but that didn't seem to be enough. You may notice that part of the tank extends below the sewer connection (I didn't at first) and standing the tank up to empty it doesn't get all the water out. My tank is pretty stinky from the grey water I tried to risne out a month ago. I'm going to re-rinse it and try some bleach to kill off the smell.
You should have received a cheapie section of sewer hose, a hose clamp and a fitting (Barker only included the one)....it's the fiting you need to connect on the tote end. If you have the fitting Barker sent, remove one end of an extra sewer hose and replace it with the Barker fitting. You may need to heat the hose with a hair dryer to get the hose to supple enough to stretch over the fitting. I bought a short sewer hose extension just to use for the tote.
2013 26BH ghetto model w/ 4 plain rims and some rust
2001 Silverado 2500HD 6.0 gasser
I have a fever...and the only cure is more camping!