Connecting C wire

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SAS

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I need to connect the blue wire in the picture for a new thermostat. Can I connect it to a terminal here? Can I use the ground?
File Jul 17, 9 45 51 PM.jpeg
 

Stuff

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Yes, you can connect your spare blue wire to the C (common) terminal - it is upper left that has the thicker black wire on it.
 
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Hey, wait a minute.

This is awkward, but...

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