Welcome to the Newmar forum hatris.
Each slide control has its own fuse located on your 12V fuse panel.
The control maybe under your kitchen cabinets or in a hutch near bathroom wall.
Some controls you may find on outside in compartment drivers side, your fuse panel maybe near your load center or in outside compartment under driver.
This is mine mounted under KC on outside wall.
You may want to check the two plugs into control that should snap in their slots.
This PDF is how your slides work.
If you have checked everything let us know how your making out if more help needed.
In the Quick Tips & Mod LINK below there is more info on control and slides.