Haliboo:
My TI is highly modified, so pics won't do you much good.
Here is a quick pic of my stern, you can see the grey safety line, you will need to attach yours to some other convenient spot (doesn't really matter where you tie the ends).
If you wanted you can also wrap the safety line under the gudgeon, similar to the lower joint.
I have a new stern on my boat now, so you can't see the gudgeon, however here is an older pic from yrs ago (before I added the planing hull mod), that you can see the grey spectra safety line at the base of the gudgeon, that is wrapped around the rudder pin at the bottom. The upper safety line (you can't see it in the pic), is also wrapped around the back side of the gudgeon (near the top).
The only purpose for the safety lines is if the rudder pin half breaks at either the top or the bottom, the mod, helps keep the other joint from breaking until you can pull ashore and make repairs (replace the pin). The mod does nothing to prevent the pin from breaking, basically if you bump the bottom you will still break the rudder pin, or if your screaming along at 15-20 mph and crank the rudder hard, the rudder pin breaks, the mod doesn't change or effect any of that stuff, it only makes it possible to now struggle on home with a partially broken rudder (steering poorly).
You don't really need to do anything if you don't want to.
I only did this mod because I've broken dozens of rudder pins hitting coral heads and shallows in the keys, while far offshore and my boat is considerable faster than most stock TI's with the massive sails and big ole engines, widened footprint, and the planing hull mod, all of which exceeds the original design specs for the boat on pretty much everything, (the original boat was designed to travel around .6 windspeed (typically 4-6 mph), my minimum cruise speed is around 8-10 in light winds (under 7mph winds) and the boat tops out at around 20 mph (but you don't want to be in the boat at those speeds (lol)). As seen in this video even at just 10 mph speed in 6 mph winds, sailing the boat is such a handful and so physically demanding, it is simply no fun for anyone. So I only go out anymore in dead calm water and very low wind (which happens to be 80% of the time around here), and pretty much limit my speeds to 8-10 mph, (mostly because of my broken back).
https://www.youtube.com/watch?v=-npwA3izDiw&t=13s[youtube2]-npwA3izDiw&t=13s[/youtube2]
Keep in mind this is our only family boat anymore (we sold our Searay, and all our other Hobie kayaks). The keys and sw Florida are vast areas. 2-3mph average speed in 95 deg sun for many hours at a time simply doesn't cut it for us, especially in the strong currents around here, (extreme risk of heat exposure, (been there done that)). We mostly use the boat for diving and snorkeling offshore, day sailing only. I'm not about to do somethin crazy like the everglades challenge, we just use the boat as an SUV for anything related to water, (kayaking, boating, sailing, etc), been using it this way for 6 plus yrs now, and are very happy with what we have.
FE
Sorry that's the best I can provide.
FE