The design ideia is from emeraldmeadows (https://www.thingiverse.com/thing:2419239) i just made some minor changes to the concept.

The holes in the box and lid are tight enough to use a tap. I use M3 screws for the box and M2.5 for fixing the ceramic sockets to the LID. You can also use Nuts if you prefer but you need to drill open a bit the holes.

The discharger in question is this one:
https://bit.ly/4eAK29U

I recommend printing this box in ABS/ASA.