Speedometer not working

[Vortech]

My speedometer was not working so I disconnected from back of panel assembly to see if inside wold spin while If drove it. It was not spinning, I fiddled with it while driving and got it to work for a second. The transmission is a 3 speed with OD. The attached picture shows the cable ends. The red end plastic tipped was in the cab. The other end was in the transmission. Is this the correct orientation. What could be the problem?