Mallard - TONGUE LIGHT:M32

There is a light on the low front-passenger side of my M32. The issue is that I can't find a switch to turn it on. Is there a switch for this light or is it possibly activated by turning the bed light on for my truck (while plugged in to the 7-prong...)?

If the light is similar to the one on my North trail, then there should be a rocker switch on the bottom of the light itself.

Here is an image of a similar style light. You can see the switch on the bottom side of the light in the photo.

Thanks, Silverado,
That was the correct answer. I now feel pretty stupid but at least I have the answer to my question...