This appears to be the speedometer connector:
Male: FW-C-3M-B
Female: FW-C-3F-B
Available here:
https://www.aliexpress.com/item/4000666843492.html
And here:
https://www.amazon.com/dp/B079LH1H1L
A pair of these would make one of the speedo healer installations quite easy, without needing to cut the harness of either piece. Also easily removable when you want to sell your RX3 and upgrade to an RX4
I've got them on order and will confirm they're the correct part when they arrive... in a month...
Charles.
Charles.