In FE the indication legato was put between the pentagrams. It is unknown whether such placement complies with Chopin's intention or if it is an inaccuracy in the base's reproduction. After all, it is not of practical importance, as in Chopin's notation signs and indications placed over the R.H. may refer to both hands.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Inaccuracies in FE, Placement of markings
notation: Verbal indications