This previous vs the latter picture with the perpendicular aligned engine shows the push rod tubes more clearly. They look very similar to those on VWs. There's a technique for expanding (lenghtening) the tubes prior to torquing the heads, to avoid oil leaks. I'm going to assume that's the source for the rotary marking it's spot(s).
Little Tomoca Yatch Club (just NW of Daytona), '96, several guys come in making an issue about a saki burner in the parking lot leaking oil all over the place. I step out to check on my VS1400. My Intruder had several large piles of rice under it