I run cannon terminators on all my riggers except the probe.
Your cable needs to come in contact with the metal connection on the probe in order for it to send the signal from the probe up the cable.
Best advice has already been given.
Redo the connection every season whether it needs it or not.
When you redo it, put the weight on with no probe, and before you tape it up, and bounce it around a bit to make sure its good.
Then inspect it, tape it up and you will be good to go.
Glen