This Victron Energy 500A shunt is the newer (IP65 version, released 2023). I think the older non-IP65 version has the same bolt hole spacing, so this cover should work on that one too. This is a simple cover to protect the 10mm hex bolt heads. I found (after printing this one), that there are a couple other designs on here, and all are for the older version, and most are full covers (or larger more protective ones). Other common solutions I found on the Internet are clear lexan/plexiglass covers too. This one is printed in PLA, because that's what I had loaded at the time, but I would recommend ABS or ASA, something with a little more material strength.
The author marked this model as their own original creation.