Yes - exactly as Martin described and as shown in pictures from Clemens. Revolutions added a small dense foam layer to the metal plate that sits under the leather to stop this from chafing the seat (showed me evidence of this on older CX cars when supplied from new). Overall it raises the belt a little - about an inch - and pushes it away from the seat enough to make it easier grab when initially fastening.
That reminded me. I had some leftover leather motorbike handgrip wrapping. It attaches with 3m type sticky backing, easy to remove. I stuck a short (< 2") strip onto the top of the seat, underneath the new seatbelt guide, just to give protection to the seat from any chafing. Seems fine. So far the new guides are still well proud of the top of the seat.