Writing the location in a ketubah

Hi,

Where the ketubah is written in a location other than the place where the chuppah will be held, then the groom's actual kinyan accepting the responsibilities in the ketubah, attended by the witnesses, should take place only on the site of the chuppah. The location written in the ketubah should be the location where the witnesses watch the kinyan, which is where the chuppah is held.

(Rav Moshe Feinstein, Igrot Moshe Orach Chaim 5:9:3)

Have a great day,
Mordechai