Not sure about the connection between the console and the type of seat belt. The general brochure from August '73 H248 has the Monaro LS with then standard retractable seat belts but with what looks like the early style console. I was not aware of any HQ Sandman with retractable seat belts at the time but I would only have been exposed to XX7 vans and utes here in Queensland I expect.

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When you consider the standard equipment in an SS, a Sandman is very nearly only an SS version of the van and ute with different striping and cloth inserts . . . more food for thought?