90 Pcs Silicone Rubber Hole Plugs, Assorted 9 Sizes Snap-Locking Round Stopper Plugs, Heat Resistant Black Hole Cover Kit for Furniture Cabinet, Automotive Wiring, Hardware and DIY Home Decor

One change, after testing. The replacement grommet I referred to earlier was too tedious to insert and remove, so I went with this grommet that works well (testing with it was successful): Assorted Silicone Hole Plugs: https://www.amazon.com/dp/B0FX5H9M42