Speedo wiring problem

[HHV8]

I am in need of your expert advise, recently took the body off to carry out some work on the chassis, unfortunately although I thought I had disconnected everything when we lifted the body the wiring from the rear speed sensor was still connected.
The wire broke or became disconnected about half way along he chassis.
Now the body is going back on I cannot locate where this has separated from. Can anyone help with this.
I can't locate a connector or the other ends if it has just been pulled apart. Where do these wires go back too.
Would appreciate any assistance

Cheers