Rather than directly connecting devices with cables, we always specify structured cabling be installed from a patch panel at the rack location to jack plates at each of the devices in the room.  Then short pre-made jumper cables connect the jacks to the device ports.  What is the best method to draw these patch panels and jack plates in the Block Schematic Module?  As a frame of reference, when using other signal flow drafting programs, I typically represent these jack plates and patch panels as shown in the attached image.  
27% of original size (was 1864x335) - Click to enlarge