With all due respect, I beg to differ.
If reference is made to a jumper, the jumper pins must exist in order to be called a jumper.
Case #1: The documentation for the HP Z420, Z620 & Z820 all refer to a similar E15 where a jumper (i.e. 2-pin header) actually exists.
Case #2: If I make reference to a pier being present over a beach it's not good enough to only have the foundation present. The pier itself must be preset to call it such.
As a side note, it turns out that the BIOS itself wasn't the issue. The PC screen remain blank (no video output), no sound, not LED signals. The problem was the DIMM sockets. If only DIMM socket #0 was populated the PC would boot up. Populating any of the other DIMM sockets (in any combination) would cause the PC to "play dead". All DIMMS themselves are working 100%.