This extension cord has a wired outlet (MH44005) on one end and the plug (MH44007) on the other. I use it for mounting an outlet in a room where the walls are too thin to pound the nails of the 44005 outlet in. I glue the outlet directly to the wall and run the wire through the floor and solder the ends to the 12 volts of the dollhouse.
Check out MH44007 for the plug that fits this outlet
Check out MH44005 for the outlet for wiring into flat tapewire.