Check out BAL systems for advice on adjusting the slide cables. The outside ends just come out sideways thru a larger slot, if there is some slack in the cables. Should be a rubber grommet in the slot next to the cable end to prevent accidental movement of the cable end getting out of the slot. If you loosen any of the cables (they are marked at the adjustment nuts) above the slide inside, you should be able to move each cable out of the bracket without any cable coming off the rollers.
2016 Tiffin 40QBH
2005 36TK3--retired, but it was a good one
2017 F450 KR