Glad to hear you got sorted. I still think it's odd to look for wiring diagrams for a Prelude part on a Civic forum, even if that part is going in to a Civic. Intuitively, I would look to a place with other Prelude enthusiasts as they would provide a better resource for Prelude information, but I suppose that's beside the point now. You might still find my DIY helpful if you are going to wire those heated seats up to the fuse box - you'll need to know the wiring pinouts of the Civic fuse box as this is different from the Prelude one.
Good luck with the project.