There's a lot of great material online covering how to convert an ATX power supply into an electronics lab power supply. These normally expect you to cut into the actual enclosure of the unit. This project takes a slightly different approach by using a female ATX adapter which allows you to plug in any PSU into the brick. If your PSU dies, you can just hook-up another one.
The colored banana jacks follow the ATX color conventions for voltages as follows: