On the left side of the distribution panel are three screw lugs that have four wires attached to them--two red, two white. Two of those wires, a red and a white, are connected to the converter. Two of those wires are connected to the battery, one red, one white. If you're removing the converter from powering anything and substituting the power supply, remove the converter wires. Use the two power supply wires, one (+) phase, one (-) phase from the power supply and put those in the respective screw lugs you vacated.