That was not my tiller I have the photo of. only different is the Tiller clutch on the bottom forward of the pin. See the photo from earlier of the pin.
I completely do not understand your comments. Perhaps a little rephrasing might help.
Anyway, if the pin is for a tiller pilot there will be other connections nearby that are needed for it to work. If it's for a "tiller tamer" or some type of mechanical locking device there will still be some connections... small cleats, eye straps, etc. but nothing like the very recognizable hardware needed for a tiller pilot.
In case you have no idea what one is: A tiller pilot has a long rectangular body containing a compass, computer chip and the motor and gears to move a push rod that connects to a pin on the tiller. The compass and chip direct the rod in or out to control the tiller and steer the boat. Using a pin on the tiller allows you to lift the tiller pilot's push rod on and off quickly and easily. The body of the device is connected to the boat by a single, vertical, piston like peg that slips into a socket which orients the entire device at 90 deg to the tiller. A tiller pilot needs electric power to operate... and many of them are capable of communicating with other instruments on the boat...so there should be some type of waterproof electrical socket nearby.
You can also look up "tiller pilot" in your favorite search engine to understand how they are mounted in various boats.
Okay.... time to do your homework. Do a survey of your cockpit. then get back and
tell us what other unusual things you found. Then....we'll be happy to tell you how to hook it up and use it.... because... a tiller pilot is one of the very best pieces of kit you can have whether you're sailing short handed or with a full crew.... and if you have one. you need to know all about it. Good luck, have patience.