I purchased the NexPeak 12V/ 10A 24V/ 5A charger. Inside the CMM1200 switch module is a white wire (+24Vdc from the battery) that goes to the 3 pin charge connector. There is a factory installed diode on the white wire . This must be removed & the wire spllced together, soldered & shrink wrapped. The CMM1200 charger connector has 3 pins . +Vdc, - Vdc & Sense. The sense wire is not used. After that simply cut off the charger connector cable at the original charger & solder in the + & - wires to the Nexpeak units + & - wires.(Red is + & Red/ Blk is -) (shrink wrap. Remember!) (cut off the clamps) & you are good to go.