I purchased two BBB and WCC and I am in the same case than you.
The WCC are not recognised by the BBB...
If you get some result about this, please inform me, I'll do the same If i make some progresses.
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Did you happen to see this:
I don't know if it will help but it looked related to your issue.
I haven't had any success connecting the wireless cape to the Beaglebone black. Has anyone had success? If so, where can I find resources on how to prepare the Beaglebone Black to except the wireless cape? In going down the wireless cape rabbit hole I found several references to uploading SDKs to the SD card the BBB is booting off of and/or downloading/pulling various scripts. The issue I'm having is the card is reading as full of in the case of the SDK image described on TIs site the BBB Debian image is being wiped in the process of loading the SDK. I'm running Debian Jessie 9.1.