Made an XLR-Switch Box for 3 XLR Inputs and One Output
I used 8 countersunk screws for the XLR-Connectors. The Holes are Standart D-Mount dimentions.
The Lid is held in Place by 4x M3 Square Nuts
I used this Switch: https://www.ebay.de/itm/271646476496
The author hasn't provided the model origin yet.