"Blinder" pin missing, otherwise everything OK

First, the most important: the adapter met on any ancient Dell Latitude C series notebook along with an 8GB CF card a brisk and silent replace the HDD.
Why the deduction: the adapter has, in contrast to me known 2.5 "IDE HDDs Saemtliche 44Pins in the HDDs is missing in the middle of getting a pin at the connection of the Dell laptop is missing the pin by a corresponding." Blind socket "marked on the pin layout. The meant that I was able to plug the adapter until the connection after I had drilled the blind spot on the terminal block of the notebook with a 2 mm drill, so that the" surplus "Pin purely fit. I am familiar with the connection is not made and do not, if the "surplus" Pin has any function, but might help someone this info what. Kuckt so previously to see if your connection is full, or if this is a hole in the female connector in the bush center is closed.