Slots, I think I remember now. If the slots are small and say big enough for your thumb maybe and what runs between the pockets then you are talking about where the tie down strays go after you cinch the pack up tight. I left mine back at the homestead so I can't look at it. Be sure to pick up some alice clips at the local surplus store so you can easily attach stuff to the outside. Have fun with the pack.
Proxima est Mors, Malum Nullum adhibit Misericordiam