7U Performance Case 104HP MIDI In,Out,Thru board

Hey guys! Quick question: Does the MIDI IN jack passively get routed to the MIDI THRU UART pins on the board even when there is no IJ module using the jacks board? I am using the UART pins to connect the case MIDI jacks to my FH-2 and would love it if I could additionally connect MIDI to my Disting via the MIDI Thru ports.