What is this wire?
 

Recently I had to change the radiator on my RX-8 and after installing the new one I noticed this stray wire sticking out and I have no idea where it's come from! (pictures attached). If someone could please advise me what it is and where it needs to go that would be great.

Thanks in advance.
https://cimg6.ibsrv.net/gimg/www.rx8...a14e815245.jpg
Circled in red
https://cimg7.ibsrv.net/gimg/www.rx8...76bfa55eb6.jpg

Coolant reservoir bottle coolant level sensor.

See the pictures in post #1 of this thread and youll see how it should be mounted to the bottle as well.
https://www.rx8club.com/new-member-f...k-like-267781/

Thanks