Afaik, zippers are usually on the entrance side. That said, if straps are loosened, you ° might° get enough slack to open the slide, but would be a pain to get the cover up. Unless there are covers with zippers on that side...
Jayco Designer 30 RKS Medallion pkg, Trail Air pin
'05 F350 6.0 PSD CC 4x4 DRW LB B&W Companion, Edge Insight
“Certainly, travel is more than the seeing of sights; it is a change that goes on, deep and permanent, in the ideas of living." Miriam Beard