One of the HP engineers who has been very helpful to us here has recently posted on a related question, and he has access to the schematics and the internal design details of these workstations. His post is on this thread, HERE :
Dan tells how to jumper the header to make it believe the cable is still connected, and it would not matter whether you jumpered at the motherboard end or the far plug end, as long as you got the correct pins/plug holes jumpered.
Note his caution.... that seems to suggest that the pins on the motherboard are not as stout as the ones we are used to seeing. A proper sized insulated wire jumper with a short segment of wire exposed at each end can be used as a jumper at the far plug end of a cable, rather than the little plastic jumpers we use at the motherboard pin end of thins. If you carefully figure out the wire colors this should work.
The wiring of such headers/cables within a HP workstation family are usually the same, and things can stay the same from one generation to another, in my experience.
