How to install a sail on a boat?

Ok, it’s been 2 years, but I’m back, and the first thing I want to ask is; how do I install a sail on a boat? I came back to this game and in one of my games I snatched a raft from a riverside house and decided to cruise along the river, because it’s just easier that way. Free water, (nearly) infinite fish, (mostly) safe sleep on my raft at night, and easy escape from enemies. Rowing is really slow and exhausting though, so I made a sail to put on my raft, but when I go to install it, it doesn’t say anything about a sail, I even tried removing the seats but it won’t work.

Install it on an otherwise empty frame. Then see what else you can put on the tile. That’s generally the best way to test what you can slot in on vehicles.

Dont think it can go on same tile as oars.