In the modern terminology for these concepts, one direction
is given, and it tells the people in the center 1x4 which
outside pairs they work with. The outside pairs notice
which center people have chosen them, and they work with
those same people, so that the virtual 2x2's are consistent.
The direction does not apply to the outsides.
The people in the center 1x4 who work with a given pair of
outsides may be adjacent or not.
\syhDBDs{b4w,g1n,b1s,g2w}
\syhDBDs{g4s,b3e,b4s,g1w}
before Right Jay Sidetrack
after
The older terms such as "Back-to-Front Jay" had the dancers pick out
whatever distorted 2x2 setup would result in the given facing
directions. From a 3/4 tag, for example, Back-to-Front Jay (or,
equivalently, Front-to-Back Jay) would be the same as Front Jay. This
is because the outsides had their backs into the 2x2 in any case, so
the centers need to be facing into the 2x2. The term "Front-to-Front
Jay" was never used — it was just "Jay". The "Jay" concept is of
course still commonly used.