Its the header for the c/locking. Its an 18way connector (i think).
Header K109 actually includes connectors C285 up to C293 (9 seperate connectors)
Feeds in from CCU and out to the doorlocks on the Orange, and Brown wires for lock/unlock&Superlock (all doors) and the Pink for the passenger only (two stage unlock im guessing) plus other connections.
Page 60.1 on the RAVE electrical diagrams. Just dont know where on the car it is located.
Looking at the wiring diagram, i believe the closest wiring colour match to be yours Chaser, is that located under the dash support bar? didnt see a connectors in that area....