I'm sure you used the blade to straighten the prop before removal and that clink was not the prop hitting the well.
Did you try and plug the throttle alone into to the battery?
I always spray the connectors with aeroduster to get rid of particles and sand.
i also use Deoxit D5 Spray Contact Cleaner - great for all electrical contacts. No residue.
Dont use grease.
Make sure all the connectors are seated properly and screwed in finger tight.
I tried mounting the throttle on the right (I sail from the front) but found it got in the way of the main sheet.
Also make sure you have easu access to the down rudder toggle.
There is a little cheat sheet of errors that comes with the motor.
Torqeedo can be contacted directly and respond pretty quickly:
171 Erick Street, Unit A - 1
Crystal Lake, IL 60014
T +1 815 444 8806
F +1 815 444 email@example.com
The specs say that everything is water tight...
But this old school engineer still puts the battery in a plastic container with holes for the cables and it sits behind the rear seat.
I also rinse off everything after each sail - don't want salt water near electronics.
Good luck - it really is a good motor.