TR16 battery gauge mount for Ryobi RM480e mower

When converting a Ryobi RM480e riding lawnmower to lithium batteries, a replacement battery gauge is needed for accurate charge information.

The<b> TR16 </b>(w/ a 100A shunt/sensor) is a good choice, but it needs a slightly larger mounting hole. (At $32,<b> this specific one </b>was the cheapest on Amazon when I bought it.)

This adapter mounts a TR16 meter without cutting a larger hole in the thick metal panel, and is only about 3/4" tall.

I bent the new mounting bracket to fit (see photos) but you can also reuse the sturdier original bracket by adding 2x M4 screws.

Be sure to print it in PETG or another UV-resistant filament.