Yup.... those 'jack-nuts' look like a good fix for that problem.
I have a few loose bottom blind tension screws that could use this help also.
'07 WildCat 30 RLBS ~ West Coast Edition ~
Trail Air - Tri Glide Pin Box
2000 F350 Lariat DRW 4x4 7.3 Diesel 89k miles
Edge programmer, 4" SS exhaust turbo/back,
Tru-Cool Max Trans Cooler, Bilstein Shocks
Vancouver Island, B.C., Canada