The engine sensor wires that were split into two bundles are now zipped tied, one for behind the firewall and the other forward of the firewall. The Dsub end was connected to the EMS unit and the wires threaded above all the other wires, tubing and the plethora of other important items, behind the rear instrument bulkhead. The forward wires were then jammed, I mean threaded, thru the upper firewall opening. This opening is now nearly at max capacity. I also physically installed the 12V plug in the center floorboard tab. Although the wires are connected to it, this remains to be wired to power.