tailight cover on 2008 Class C Four Winds Siesta

Here's a video of how to replace the bulbs in (what seems to be) the same type of lamp unit on a Dodge Ram pickup. The lens is permanently attached to the reflector, and the whole unit held in with a screw or two that (on the pickup) are on the side covered by the tailgate when it's closed. I would assume that there must be similar screws holding it in place on the motorhome.