How does this connector come apart? (1971 Duster)

I seem to have an intermittent connection thru this connector for the yellow wire. No power to the instrument panel unless I press the pointed lead of a meter into the socket of the yellow wire on the top right. I’ve tugged a lot on the connector and, while I can get a little wiggle, it isn’t coming apart. I don’t want to break this thing - so I’m asking if there’s any trick to getting this type of connector to separate.

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