Honda accord only starts in neutral?

2000 honda accord v6 coupe
Replaced starter brake light switch battery and altenators good

Car doesn't start in park but if i put in neutral it starts right up.

I talked to mechanic he thinks neutral safety switch i can't find a installation diagram anywhere online.
Does anybody have one?

The switch is in the back end of the transmission a black cover must be removed to unbolt it from the transmission follow the wires to disconnect it from the wiring harness

If it starts in neutral it should start in park. IF not the switch has to be on the shifter