Here is a sturdy XT90 panel mount. Use a 1" hole saw and M2 fasteners. Print on 100%, with the face of the mount up and use supports.
I have several of the XT60 panel mounts in use on my projects, but once I overloaded one of these connectors and melted the solder joint. (This is why you install fuses, kids.) Since that time I've been meaning to employ XT90s in the same fashion but could not find panel mounts online. So I got around to it today and here you have the fruits of my labor.
Update: finalized for 2mm fasteners, no nuts required. I also dialed in the fitment so it wasn't so tight.
Update: Added an XT90-S version. The cable shield fits within the printed mount. The XT90-S version is still WIP.
Doesn't Matter PLA-PHA/PLA+