HIC Connector White Plate

Stick the back-end of a 3/32" drill bit into an unused wire hole.

The latches are on the narrow ends of the white locking plate so push as close to the ends as feasable.

Push the drill/pin in untill the side of the Locking Plate releases but push no farther until you have released both side.

You do not want to get it too uneven. Use 2 Drills/Pins if you have them) 

It will be a very hard push!  Ideally, use a Press/Vice so as not to over-push when it suddenly breaks loose. 

Once both side have released, it is possible to push the plate straight out of the front of the connector.

I find it easier to insert and inspect the pins for proper location with the Locking Plate removed.

. . .

Alternately you could fashion a set of hooking devices to pull the plate out by the small openings available at each end of the front of the plate.

This is probably what they are there for.

- - -

The bad news is that these are terrible connectors to not damage and get right the first time.

The good news is that they are not hard to replace and not expensive as large connectors go.