Swivel Seat
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I won't have any chairs or couch inside my van, so I bought a swivel which allows the passenger seat to rotate 180 degrees.
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Lots
of bizarre little electrical connections under the seat to tilt the
seat back. Thank goodness I was able to find a YouTube video that
explained how to deal with those things.
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The swivel will be bolted to this seat base, then the seat will be bolted to the swivel.
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The swivel is now installed on the passenger seat. I later did the same thing to the driver's seat.