I couldn't find the part in the humvee manuals, but I was able to identify it as part # 12339141 through kascar Bracket, Electrical Modulator Control
Bracket, Electrical Modulator Control,1993 and 1994 H1 and all HMMWV with Turbo 400 Transmission
84 C10 J code intake.
83 C10 Scottsdale w/veggie conversion.
98 K3500 Silverado CC DRW, marine injectors, 4" exhaust (kitty cat MIA), boost and egt gauges, FSD relocated, #9 resistor thingy, reman Navistar block from Kennedy installed Jan 08, Reese Signature Series Gooseneck hitch.
95 C2500 F code. Rebuilt GEP. Daily driver since Jan 2014.