Fortunately this bench power supply turns out to be very much like ... VR104 is a 5 kOhm pot in the output voltage feedback circuit and VR102 (500 Ohm) sets the maximum output current.

[Frugha] decided to whip up a neat 3D-printed design for converting any ATX PSU into a usable bench unit ... a load resistor on the 5V circuit makes the power supply think it’s hooked up ...