Use the thing, that I assume is the METAPHORAL UNICLICKER, to pull the tab.
The thing understands what you need and clicks that tab.

The options in it are METAPHORAL UNICLICKER, ALPHAPAINT GAMMABUCKET and ECTOPLASMIC NODEMAKER.
You try to reach them, but they appear to be only interactable by the METAPHORAL UNI... nah, I'll just call it a CURSOR.