Suggest that you use the Mavericks Mac to set up the Time Capsule.
Power up the Time Capsule for a few minutes
Hold in the reset button on the back of the Time Capsule for 10 seconds and release
Allow a full minute for the Time Capsule to restart to a slow, blinking amber light
Connect an Ethernet cable from one of the four LAN <--> ports on the Uverse router to the WAN "O" port on the Time Capsule
Click the WiFi icon at the top of the Mac's screen
Look for the listing of AirPort Base Station
Just below that, click on Time Capsule
The illustration below shows an AirPort Extreme. You will see Time Capsule
Clicking on Time Capsule will open up the setup wizard. It will take a minute to analyze the network, then display a window that looks like this, except that you will see a Time Capsule icon. Since the Time Capsule will run circles around the Uverse wireless, I I assume that you are planning to turn off the wireless on the Uverse router.
Network Name......Enter a short, simple name for the Time Capsule wireless network
Base Station.........Enter a short, simple name that you want to call the Time Capsule
Password..............Enter a password which will be used for the Network and Base Station
Verify.....................Enter the password again
Click Next
The setup utility will configure everything for you. When you see the message of Setup Complete, click Done
That's it.