A new response to an old post, but hopefully helpful to those down the road.
If you slide the driver side seat forward, you will see a small plastic trim piece on the rear driver-side console, near the floor. It's an access to get a ratchet/extension/hex 12mm.
I had already removed the cupholder, front and back trim which allowed viewing access down into the depths of the handbrake, enough to be able to see the nut on the ebrake cable.
In the SC Honda recommends 8-10 clicks for the adjustment.
I was able to tighten it up a bit for the adjustment needed.