Get a double sided Velcro tape and pin it to the top of the tray. 😎
https://www.amazon.com/Double-Sided-Adhesive-Strong-Self-Adhesive-Fastener/dp/B07TVZB1GL/ref=asc_df_B07TVZB1GL/?tag=hyprod-20&linkCode=df0&hvadid=366327310773&hvpos=&hvnetw=g&hvrand=10024030526827063238&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9033026&hvtargid=pla-815976890525&psc=1&tag=&ref=&adgrpid=73640184222&hvpone=&hvptwo=&hvadid=366327310773&hvpos=&hvnetw=g&hvrand=10024030526827063238&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9033026&hvtargid=pla-815976890525