If 2005 vintage 39 is anything like 2000 vintage 40, You can crawl in the rear cabin and take a look at the lazarette compartment by opening the latched door - this will reveal how the steering cables are connected to the quardant and rudder stock.
Same time at the rear cabin there is a removable cover plate up close to centerline - giving access to the steering cables and how they come down-and-back from the pedestal. Looking up to the pedestal with an mirror or a phone camera will give you the whole picture how the system works.
If, however the 2005 model is with tein wheels - I have no idea how you have visual access to these points
BR
Tommi
s/y Anniina