Eva Langley is correct, some of these controllers have only 8 pins, not 9. I myself can conformed this because I just recently opened one of two brand new fresh out of the box Sony original equipment controllers that I purchased (for a little less than $10 a piece) during a clearance sale at my local Sears just before they went out of business. So Eva is NOT wrong. I still have the second one still in the box and before anyone ask, I don’t won’t to sale. I purchased them because I have had both my original controllers go out after they were sitting up for a few years without use. My game units are very well taken care of but the controllers of the PS2 just stopped working and finding a definitive answer to why this happens is STILL very elusive in 2019.