tranny plugs

i wanna get a speedo workin in the truck. i got a gm ??? its a standerd transmission and i wanna know if the plugs i got will hook up to an autometer speedo
pics of side of the transmission.
the black one is the plug. is that the sender to the speedo?

this is the plug in the tranny.one would be ground and the other would go to the speedo. is this it?