I would do google search for NA12S control box. Does Suzuki make the NA12S control box?
So your coming from a tiller and need to know how the control box levers work?Forward,Reverse,fast idle,
Anyway to get the old owner to show you, or anybody else that has a boat to show you. You could go to the dealer/mechanic and ask don't be shy,
There's an un spoken rule in boating, All boaters help a boater in need.
fun fact were crabbing i need a cork screw pull up to this yacht and ask to borrow his cork screw were in a 17foot whaler pink,raw chicken juice everywhere from crab bait,it was nasty, guy comes back with a very old antique cork screw looked expensive, i pulled the cork handed it back to him he almost didnt take it back our boat was so disgusting from raw chicken juice.