Perfectly understandable en vacuo, even,
and certainly in the context of the OP ! :
The form is roughly that of what Harry Asher
named “shakehands” and can be found in [u]ABoK
in #1048 IIRC?
FYI, a 2-eye version can be formed, where each
eye is in the place of a shakehands tail. (And similar
things can come from other of the interlocked-overhands
end-2-end joins such as #1408 & zeppelin.)