A Hit on 

Fastener for those without a cat ramp

Fastener shown in place
(for those with no cat ramp and if placed where the litter box may be moved while in use)

You may make one from a length of elastic tape 16-18" long, and place self-sticking Velcro
tape to the ends, as well as the LitterMaid.

Pre-made fasteners are available for $7..95 including shipping.

Fasteners -  recommended for  those without a  cat ramp

Out of Stock Future Availability - unknown at this time $7.95 including shipping Color and pattern of the lace may vary. Alternately, you may place a heavy object, such as a brick wrapped in Kraft paper, next to the Slide & Toss to keep it from sliding out