Ive seen those(or atleast very similar) on most late 70's thru late 80's SBCs. I thought it routed the starter wires round the exhaust behind the back of the motor, not nessesarily just the battery cable.
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Beaumontguru
MY BEAUMONT HAS 4 STUDDED TIRES AND 2 BLOCKHEATERS......AND LOTS OF OIL UNDERNEATH. The other one has a longer roof.