This works with the Ornate Criminal module to add 3.5mm MIDI in/out and USB host/device.  USB Host is USB-A and USB device is USB-C.  The 3.5mm jacks are switchable between A and B styles of 3.5mm to DIN connectors.

The 2x5 cable connects to the 2x4 pin header for MIDI with the red stripe of the cable aligned with the red marker on the PCB and pins 9/10 not connected to anything.