Thor Forums

[TurnerFam]

that 'opening' is there because otherwise you could have a kitchen, or plumbing, or wiring in a 'slide' opening without it, since the slide 'moves', but the wiring and plumbing does NOT!

When the slide is OUT, the wiring and plumbing is generally under the sink/cabinets, and you'll see them all close to the outer edge of your cabinets, on the inside, of course.
When the slide is IN, though, all these wires and plumbing lines are at the REAR of the cabinet base, but you'll get a much better view of this 'slot bag' since it will be right at the front edge.
It's also a way to run temporary coax TV cables or extension cords when you need a good way to run them thru a slide.

The 'bag' is simply a velcro 'cover' to give those lines and wires the ability to 'hide' while the slide is out - which also serves to prevent unwanted 'critters', as well, at least as long as the bag is properly velcro sealed, though admittedly, mine never has been.
I use some basic fiberglass insulation to stuff up into this area when parked for long-term, for weather, temps, critters, etc.

The 'seals' you mention are also there for the same reason, to help 'seal up' this slide slot when the slide it out, but since it's probably not the best way to do it, but the factory has few other options.

Our bedroom slide has NO slot, of course, since it has no plumbing or wiring going down thru it, so it's totally sealed on the underside... but most full-wall slides will have some sort of wiring or plumbing or both going thru them, therefore a slot is required.

ENJOY!