How to keep cat out of the mechanism in our FW's bed

I'm not familiar with your RV/bedroom slide.......


Our bedroom slide is fully boxed (storage under bed/mechanism under storage area) with only 1'2" or less clearance between floor an boxed frame.

What ever is 'open' for easy access to mechanism.....why not just close up using a thin panel attached with screws.
Not like you need easy access until you have to work on mechanism.