The 'female' end that appears to have two sets of lugs; the large tabs are to assist in swiveling the collar while a sewer hose connects to the stubs below.
by Camping World – November 12, 2015
Transparent fittings connect sewer hose to waste valve fitting.
If you wish to share feedback with us about product selection, pricing, ordering, delivery or other customer service issues, please do not submit this feedback through the Question & Answer Service. Please contact Customer Service at 1-888-626-7576.