It looks like there are hose/sprayer kits on Amazon and eTrailer that work with all Dometic gravity toilets. If you've got the space to add the kit, it looks possible.
Check out the option below, the first question is about the 310 and etrailer confirms it will fit.
Forgot about e-trailer, i watched the video and that's what i'm gonna do, sure to enjoy the camping experience spending more time camping and less time cleaning. thanks again!
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Rick & Melissa Young & Dawson (RIP), 2011 Meridian 40U, FL XCL, ISL 380HP/DEF, Al 3000 MH, 2014 Honda CR-V, SMI AF1, Blue Ox TruCenter & tow equip.,EEZTire TPMS. Servants On Wheels Ever Ready. Best job we ever paid to do . (full time volunteers)