DougE wrote:
My guess is that they're to keep the support poles from moving around when they're stowed under the mattress for traveling. Otherwise the poles might move down to the end of the bed where they would be difficult to reach.
Maybe? But the poles are actually kept in this compartment at the back of the rear bunk that you can access from the outside before you pull out the bed.
Here's a pic of it. It's hard to see because the bed is pulled out right now and I can't push it back in to take a proper pic because the painting we're doing on the inside is still drying.