Dashboard voltage limiter?

I'm looking at the dashboard voltage limiter and it has a piece cardboard under it. At first I thought it just fell into that position, but upon further investigation i see that it was intentionally put there. Punched specifically through the center pin that goes to the brake warning lamp and the condenser wire that plugs into the same spot. Anyone know why it may have been done
The fiber board is a insulator to keep the rivets under the IVR from making contact with the traces on the cir board.

The way the IVR works is there is one pin that gets key switched 12v power. It then converts that 12v to pulsed DC at around 5-6 v

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Watch this video it will teach you all about our gauges.