⬢Insert the heatbed into the center of the printer as in the picture with the terminals facing down. Keep it in an upright position. Make sure the heatbed cables are accessible below it.
⬢Prepare the power connectors into the indicated layout. Keep the printed part on.
⬢Red (+ / positive) wires are closer to the center.
⬢Black (- / negative) wires are closer to the sides.
⬢Connect the data cable to the center connector.
⬢Attach the power connectors into the terminals and fix them in place using the previously removed screws and the Phillips screwdriver.
Double check you have connected the power cables correctly!