If you've ordered the enclosure from the Wilderness Labs store, it already comes assembled with the heat-set inserts in it, so you can skip this step and go directly to Electronics Installation instructions.
However, if you're 3D printing at home, you'll need to follow the instructions below:
Stringing and burrs are a by-product of printing with PETG and are mostly cosmetic, but can easily be cleaned off with a box-cutter knife, razor blade, or similar.
Install a heat-set insert tool into your soldering iron, plug it in and turn it on. After a couple of minutes it should be hot enough. Place an M3 heat-set insert onto the end of the tool, being careful not to touch the hot tip:
Then, while holding the enclosure, guide the insert into one of the holes until it's just flush with the top of the hole:
Repeat this for all four heat set inserts on the main enclosure body.
Install an M3 bolt through the M3 insert from the inside of the enclosure, to push any plastic that might have melted into the insert:
Screw the bolt far enough that it pokes out the other side of the insert and pushes out the plastic:
Remove the bolt and repeat for the remaining M3 inserts.
Once all four have been plungd, using a knife, trim the excess plastic:
Using the same method, install (4), M3 inserts into the enclosure mount from the backside, and then push excess plastic out with a bolt and trim:
Finally, install the M2 heat-set inserts for the lid into the enclosure body:
