A releasable-positively-locking-connection (RPLC) between first/second bodies, including: a) a linear-guide between first/second bodies, so that the linear-guide is engage-able; b) a separate-securing-element, fastened releasably by one end in a first-opening in the first-body and/or in a third-opening in a third-body, so that the securing-element protrudes from the first-opening; and c) a second-body section, which is deformable elastically by the separate-securing-element in the longitudinal-axis-direction of the separate-securing-element and has a stop-face, with which the separate-securing-element is contactable; d) the elastically-deformable-section and separate-securing-element interact, e) to assemble the RPLC, e1) the linear guide is engaged between first/second bodies, and e2) first, the first-body is guided linearly in an assembly-direction along the linear-guide, the elastically-deformable-section being contacted by the separate-securing-element which protrudes out of the first-opening, and deformed elastically in the longitudinal-axis-direction of the separate-securing-element, e3) until, secondly, an assembly-end-position is reached, in which the separate-securing-element passes the stop-face and, the elastic-section springs back, and the separate-securing-element engages in a positively-locking manner behind the stop-face, and configures a stop, f) to dismantle the RPLC, f1) the separate-securing-element is released from the first/third-opening, and f2) the first-body is moved linearly along the linear-guide in a dismantling-direction, opposed to the assembly-direction, until the linear-guide doesn't engage between the first/second bodies.