A border crossing is a border crossing. Anyone with a passport can pass through.
The Ravno-Slano route is similar to the border crossing at Neum, in that it traverses a narrow corridor of Bosnia-Herzegovina and Croatia, an oddly-shaped configuration that resulted from border changes following the civil war of the 1990s.
I bicycled into Croatia from B-H at Metkovic (just northwest of Slano), then went south to Neum, where after about a mile, I re-entered B-H before returning to Croatia another mile or so down the road. Neum has a passport control station, but I was simply waved through, perhaps because I was on a bicycle.
Since you posted this back in January, you may have already traveled there. If so, tell us what you experienced at the border.