IDC Locking Header 0.156" with Locking Ramp
Used in many makes of pinball machines including Williams, Bally, Stern, Data East, Sega, and more.
These are very easy to cut with a stanley knife so if you want a 2 - 6 locking head I would suggest buying an 11 / 12 / 13 as you will then have what ever is left as a spare. Makes sense in the long run.