Yep there are only two styles of rx connectors for servos, at least on the standard systems.
Futaba and JR. Futaba has a locator tab on it's plug, so that it can only be plugged in the correct orientation on Futaba/Hitec rx's, JR has none.

No biggie if you have a JR/Spektrum style rx and Futaba style servo plugs. The tab can be sliced off with a razor knife.