Found mine tucked up above where a clutch pedal would be.
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Wayne & Roberta and Maggie the Miracle Dog
08 Winnebago Destination 39W Gas UFO Workhorse Chassis
Making the Journey in our Destination
Mine was in a plastic baggie type affair with a rubber band around it. Located just about where the other poster indicated. It is behind other cables etc. about where the clutch pedal would be.
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Wayne & Roberta and Maggie the Miracle Dog
08 Winnebago Destination 39W Gas UFO Workhorse Chassis
Making the Journey in our Destination
You mentioned antenna, are you sure that you have a C B antenna? Usually it on a spring base just above the drivers side. Don't mix it up with the rubber ducky radio antenna. Saying that I believe the installers have a contest to see who gets the prize for the best hiding place. Mine was in a baggy to the left of the steering column halfway under the carpet, or was it stuck up under the dash, I don't remember. Good hunting.