rx7 FC S4 NA european transmission
 

Hello,

I have an rx7 FC S4 NA (european/norwegian) 1986 and I'm very confused by the front switch/sensor on my transmission. The transmission has 3 sensors. If you look at the image below it has 2 sensors in the rear where the stern-port side switch is most likely the 5th/reverse sensor, whilst the stern-starboard is the neutral switch. But what is the front, bow-port side, sensor for?

Thank you so much for the help,
Eirik

https://cimg4.ibsrv.net/gimg/www.rx7...d385761af0.jpg
https://cimg7.ibsrv.net/gimg/www.rx7...db0ec7fa45.jpg
https://cimg8.ibsrv.net/gimg/www.rx7...19b91955fd.jpg
https://cimg9.ibsrv.net/gimg/www.rx7...cfad6cac9b.jpg