2015 sv233 shift problem/ sensor??

[Bassertn1 0]

I’ve narrowed down my starting problem to the shift sensor. Sometimes when running it won’t go into gear, sometimes when ignition is on it won’t start because the boat thinks it’s in gear. What controls the communication to tell the transmission it is In Gear and where is it located? Intermittent problem but getting worse so I’m assuming there is a junction somewhere that tells the boat to shift when lever is moved. Any help would be much appreciated bc I can’t find anything online