Yes, I think that’s the relay that keeps the slides from being moved when the ignition is active. Though I didn’t see diagrams for your Contessa there, the wiring for a 2002 Patriot on page 33 identifies its K10 tied to the slide power switch and ignition. I.e., one or the other can be on but not both at once.
Joel
Addendum 6/10/2022: added full screen image of wiring diagram
