Summary

Works great with both amass female and male XT-60 connectors.
Printed in PETG with 0.2 layer height.
This adapter (holder/enclosure) uses CTP9 fast charge trigger, which shown in the photos and could be found here.

Assembly steps:

1. Turn XT60 pins as it is shown in the photos.
2. Put XT60 and trigger board inside bottom piece (no USB-C hole) and solder it together right inside of the bottom piece.
3. Snap upper piece on bottom piece while leaning upper piece against one of bottom's edge.