68 Dart Circuit board query

Hi All, I am replacing my Instrument Cluster circuit boards, and noticed the connections on the new board do not have impregnated "Washer" type mounts as per the original board for ALT and OIL gauges; where the respective wires hook up from behind. I was wondering if this means anything, and of course if they will still function without these metal mounts?
Please refer to my pic for a direct comparison between the old BLUE type circuit board, and new installed GREEN board showing no metal impregnated.

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