The connecting piece has distal attachment piece of the connection tube with a locking element, that is formed so that a form-fit detaching connection is produced with a connection piece of a probe tube of an enteral feed probe (2). Another locking element is provided with the locking element of the distal attachment piece. A detaching connection is produced with funnel-shaped connection pieces of different diameter of the probe tube of different enteral feed probes. An independent claim is also included for an arrangement of an enteral transfer system.