75 Duster Tetnus Shot and band aids

What are these wires used for that are going through these 2 grommets

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Someone asked me this a while back when looking at my car. Copying my response post from about a month ago...
Did a little research...
From 75 FSM. Here are the wires going through grommets. What is really strange - in 74 book the blower and compressor switch are same as pictured here, but the oil and temp go through the bulkhead. Then in 75 they take 2 wires out of the bulkhead and through a grommet. In 76 FSM, they are all in the bulkhead connector.

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