I believe the video you are looking for is by "The RV Geeks" on youtube.
Already did one, just a matter of aligning the end caps [roll with your hand] untill slots line up on end caps, then insert 3/16 Allen wrench. Let go of roller and it will lock up on the Allen wrench.
Rusty screw in gutter may be a problem, [steel screw in aluminum gutter]
Brand they/I suggest,,"Tough tops" order online
2006 Fleetwood Bounder 35E Trek pure Trike, electric, 50 mile range, 7000 ,miles the get everything runner. To be toad list Done, Ford E450 toad. Stay & Play active brakes.
Full-time since 2018. LG 4.5 cu ft washer/dryer.