My dual shock 4 "ext" charging port is not working

I have the official Sony dual charging station, which uses what looks like 4-pin connectors in the dualshock 4's "ext" port (at the bottom of the controller, next to the 3.5mm headphone jack).

I think that the problem is my controller is not sitting far down enough on the male connector of the charging station. Is there any way I can extend this, either by purchasing or making my own type of extension?