Speedometer on 92' Rodeo

My 92' Rodeo has had the speedometer and the odometer stop work. I was told this could be due to the cable being busted. Anyone know if this is true? I was also told it might be a sensor but I didn't think it had a sensor on that old of a rodeo.
If it is the cable where do a locate where the cable enters the transmission? I am a little ignorant to car repair but I'm trying to learn. Thanks

Hang in there - I'm sure someone might be able to assist. There's not too many visitors here that have the '91-'92 years, but hopefully someone's experienced that on a newer one and has a general idea.