Toradex explains the cable/wiring you need here: Assembling Serial IDC to DB9 Cable | Toradex Developer Center
We have a Female to Female DB9 Null Modem Adapter available here:
Which would allow you to use a USB to RS232 adapter cable like the following:
CHIPI-X10 from FTDI
Then you would just need your DKT/Intel IDC10 to DSUB adapter cable, we don’t carry those.