Summary

Сase for M.2 Fibocom L860-GL modem with USB board.
4 pigtails are used on the SMA to connect mimo antennas.
Inserts for M3 threads are used for fasteners.

For mounting the board - 2pcs M3x4x3.
For fixing the cover - 3 pcs M3x4x8. But you can use inserts of any length.