IBM 5170 - Load Resistor
From the technical reference for the IBM 5170:
"If no fixed disk drive is connected to
the power supply, the load resistor must be connected to P10. The
load resistor is a 5 ohm, 50 watt resistor."
5 ohm resistor on a 12V line will draw 2.4 amps from that line.
This greatly satifies the requirement (found in the 5170 technical
reference) that the minimum loading of the +12V line of the 5170's
power supply is 2.5 amps.
Below is pictured the load resistor (caged) that IBM supplied in the model of 5170 that had no hard drive.