50 hp evinrude 75 model solenoid wires where do they go. i already know where the big wires go. its the small ones that i'm not sure about. there is a S post and a I post. i have a small wire that grounds to the power head. need to no if it goes to the S post or the I post. also have a red wire need to no the same. s or i post. any help would be great. hope this is not to confusing