Ours is on the rear of the trailer. We use it for many things.
When boondocking, we have a shower tent that we erect back there. Sure saves on the grey tank filling up too soon, and a lot more elbow room to shower in.

When in a campground, we take off the shower head and attach a hose and kitchen spray nozzle and use it along with our outdoor portable kitchen. Great because we have hot water and can control it at the outdoor kitchen.

Note: these aren't my photos, but are the products we use that I found photos of on google images.