I have 3 options:

1) make a y splitter cable with TRS jack to go to the SUB port of the Proteus 2000. The other mono ends would connect to XLR channel 1 in and out of the H9000. I would need to know which pins of the XLR in and out on the H9000 would need to be wired on the insert cable hot, cold, ground.

2) buying 2x db25 to balanced jack snakes to connect analog channels 3+4 of the H9000 to these y-cables via a female to female coupler jack adapter

3) I am already using analog XLR I/O 1+2 on the H9000 to connect to the send and returns 1+2 on the MOTU 10pre. I could always use the H9000 DB25 ports to send/return to the 10pre and the Proteus 2000.

I am trying to find the best option using the DB25 ports of the H9000, as I understand the XLR ports are channels 1+2 and are duplicated on channels 1+2 of the DB25.