it goes right on with the included OBITSU neck plug adapters.
though not really necessary, i doubled down on a nice, extra-tight head/body union by wrapping the neck plug-post with PVC electrician's tape, in this case, white, 3M SCOTCH "Super 35" found at WAL-MART...
they came from the late-90's TSUKUDA HOBBY Sakura Wars "Li Kohran" a once- near-$100.00 USD character doll which can be had for relatively cheap today;