Harding medical case for rear storage

I wanted something that was cheaper than the stock storage, somewhat idiot proof since I have my moments, waterproof and dust proof. After watching the positive and negative about the Can Am storage, I just went with something that was built to take abuse. There was a guy local to me that had them on fleabay for $129, no shipping. Other sites have about same cost plus $39 for shipping to my zip.

Exterior Dimensions: 32.75" x 20.87" x 12.61"

Interior Dimensions: 29.75" x 17.87" x 10.80"

Bottom Depth: 8.18"

Total Depth: 10.80"

Drawbacks so far are: no hinges, it’s large enough not to fit with the rear seat if I install one unless you shim it to go over the rack lip.

I can fix the hinge issue by attaching lid tethers. My question is how would you attach? Permanent linq hooks in combination with tie down? Tie through handle tube? Ratchet strap to rack?

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