Water heater wiring problem

Hello all, so I ran into a problem. I pulled the bed on my 190 to winterize. Once I have the boards up I find that the blue wire coming from the spark/ignite box for the water heater is laying there unhooked to anything. It has the end stripped like it was connected at some point. I then find every crimp connection is loose. So I replace every one and confirm I now have solid tight crimps.
There is a 16/18 gauge ribbon with red grey and white wires coming in with the grey wire not hooked to anything, it does have a crimp connector on the end. Tracing it I find it goes to the board on the tank monitor , it changes wires to a small pink one to make that connection at the final terminal on the board. Is this grey wire supposed to be connected to the blue wire on the igniter box?
If someone could check theirs and confirm I’d really appreciate it

Thank you