Alright so the 5th Quickbar will be behind Quickbar 1, as is in my case where i have 1 & 2 bottom center and 3 & 4 on the Left & Right, Respectively.
It seems that one cannot simply use the Quickslots Page up & down arrows to the right of Quickbar 1 for switching to it, nor does the interface editor show it.
You must go Preferences > Key Binding's Tab > Quickbar menu and scroll down to the Quickswitch to Quickbar Page 1-5 Options. When you bind the "Quickswitch to Quickbar Page 5" key, You now need to bind a key to Switch back (to page 1).
Once you've done this you can use your newly bound keys to switch between the slots. Quickbar 5 may already be poplulated w/ abilites, in which case adjust as needed.
Nice if you can afford two easily accessible keys to bind for switching