Searched on this, but didn't find anything --

I'm trying to remove my driver's seat to be able to bring it inside to do some upholstery work. I removed the 4 bolts easily enough, but couldn't figure out how to disconnect 3 of the 4 electrical cables to the seat. The thick cable, in particular, just seems to disappear into a black plastic box under the seat. CD-ROM isn't helpful as it assumes you have manually-adjusted seats.

Any hints on unplugging these wires?
Thanks,
Steve

'93 400E

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Steve
'93 400E