Manual H Bridge
Turn off the DC power supply before wiring up the manual H bridge. Keep the voltage set to 3V and the current limit at 1A. Connect the supply's positive output to the board's + connection and ground to its - connection. Connect the two motor wires to the two motor connections shown on the board's schematic, using the breadboard to join the wires as shown below.
Turn the DC power supply back on. Press both switches marked F to spin the motor one way, then release them and press both switches marked B to reverse it. Only press a matching pair: don't press F and B together, as this can short the power supply.