Reply to 4trak + turnatable

Hello I am trying to figure out how to set up my turntables to play on 2 of the 4trak channels either via line/phono and leaving two to drag digital from the Traktor library?
I have two external usb interfaces with midi, however the 4 trak does not support midi. I also have a djm 700 in case it might help.

I appreciate the help, cheers!