These mounts are intended to wrap around the outside of the t620, and interlock with the next stacked horizontal t620 & t620 plus. As these (except the t620 plus) are passively cooled, I found when I have these stacked horizontally there is some heat generated. This bracket allows for some cooling and organisation.

PETG/PLA

20% infill

Infill: lines

BPA: Brim - inside only (easy to slice out with a knife)

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In the plus version I removed all the cut outs due to print quality, and controlling material use with infill % in slicer.