Try a 33 second video on you tube. There is some information on Harbormoor.com too which you can see a diagram. Boston whaler which was a power boat manufacturer who built the daysailor was notorious not having a very good owner manuals. The best thing to do is blow up the picture to look at the installed gear.
Some photos would certainly help. The harpoon 4.6 ended production sometime in the early 1980’s when I became a sailboat dealer but now retired
Finally, search the archives here or go to the homepage and under forum put In Harpoon 4,6 and it will pull up approximately 50 hits on that boat
Crazy Dave