I think it will be fine if you plan on using the DC plug connection and swapping manually but I used a 1 amp diode in mine . I would not simply intercept the black wire without disconnecting it back to the 12 pin. The esc and other stuff will get powered from your new connection. Maybe insert a 5 amp fuse in the new feed to be safe.So you are saying I need a diode to stop it from back feeding into the house battery. ???