Parking brake; emergency brake - only one side works

After replacing the rear wheel bearings/cv axles last year, and reassembling the parking brake/emergency brake assembly, only one side of my e brakes engage (passenger). I'm pretty sure both sides were working before I did the bearing/cv overhaul.

I pulled the rotor on the driver's side and had my son lift the e brake handle. The pass. side engaged and tightened, but there was no movement on the driver's side.

Obviously a cable issue, but is this definitely a broken cable, or could it be something else, like the driver's side cable being disconnected?

I can't get under the car at the moment, so I'm kind of shooting in the dark here...

Thanks,

J.P.

Parking brake; emergency brake - only one side works