I need help again, i know im new to this so please bare with me.

I changed my heater core and iam still getting the dash back together. When i was looking at the heater core box, i noticed a spring lever gimick and noticed it wasnt hooked at one end. i figured this was for the heater controls but cant figure it out. does the black cable form the controls attach to this piece. i included a picture i found on google. if anyone could please help it will be greatly appreciated.
 
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