The Molex connector on you PSU should be female (4 holes). The Molex connector on your Versa C23 RGB controller should be a pass-through type male/female. Connect the PSU Molex (female) to the RGB controller Molex (male-side).
The male side is the larger side with the 4 pins (the one with the "POWER" sticker in the photo below). The female is the smaller side with the 4 holes (the opposite side without the sticker in the photo below).