2012 Montana 3700RL bedroom slide out issue

[cowbear]

Hi all I hope you can help me.
I bought a 2012 Montana 3700RL it needs some work so I am going to do a lot myself. I took it to the service dealer who checked it out and all the issues are cosmetic except for one. this camper has a super slide for the bedroom, wardrobe and washer/dryer.

when i bought it the front part of the slide would work its way out while towing it. so the dealer did an assessment and determined that the chain was broken. so after waiting over 6 months for the chain to come in the put it in but then said it would take an additional 3 hours to open the wall and adjust the cables as they have come off the pully. I thought that was odd since I already paid them to do an assessment. can anyone point me to some where that I can figure out how do to this? I also have another slide that is not aligned and have to just re align it. but any help is apprefiated