Even with a flashlight I can’t see crap under the trailer looking up into the jaws ...... I always look under there tho..also look to make sure handle is all the way back in and no gap between the fifth wheel plate and the trailer.... Then a tug test and off I go.
I noticed mine this morning (12° below) that the bolt in front hadn't gone all the way in. As much as I didn't want to, I dollied back down and rehooked.