An agricultural baler comprising: a baling chamber configured to receive a compressible material; a plunger proximate a first end of the baling chamber and configured to move within the baling chamber to compress the compressible material into a bale; a rear door assembly, comprising: one or more rails positioned proximate to a second end of the baling chamber, opposite the first end; and a rear door having multiple parallel tracks configured to receive and to guide a strap along the second end of the baling chamber to facilitate surrounding the bale with the strap, wherein the rear door is slidingly coupled to the one or more rails and is configured to move along the one or more rails between a closed position in which an opening at the second end of the baling chamber is blocked and an open position that enables the compressible material to exit the baling chamber via the opening; characterized in that each of the multiple parallel tracks comprises a first end and a second end, and a respective connecting element having a generally horizontal portion and a generally vertical portion is positioned at the first end and at the second end of each of the multiple parallel tracks, wherein the respective connecting elements are configured to facilitate transfer of the strap between the multiple parallel tracks and corresponding fixed tracks (66, 67) positioned on a first side and on a second side of the baling chamber. a baling chamber configured to receive a compressible material; a plunger proximate a first end of the baling chamber and configured to move within the baling chamber to compress the compressible material into a bale; a rear door assembly, comprising: one or more rails positioned proximate to a second end of the baling chamber, opposite the first end; and a rear door having multiple parallel tracks configured to receive and to guide a strap along the second end of the baling chamber to facilitate surrounding the bale with the strap, wherein the rear door is slidingly coupled to the one or more rails and is configured to move along the one or more rails between a closed position in which an opening at the second end of the baling chamber is blocked and an open position that enables the compressible material to exit the baling chamber via the opening; characterized in that each of the multiple parallel tracks comprises a first end and a second end, and a respective connecting element having a generally horizontal portion and a generally vertical portion is positioned at the first end and at the second end of each of the multiple parallel tracks, wherein the respective connecting elements are configured to facilitate transfer of the strap between the multiple parallel tracks and corresponding fixed tracks (66, 67) positioned on a first side and on a second side of the baling chamber. one or more rails positioned proximate to a second end of the baling chamber, opposite the first end; and a rear door having multiple parallel tracks configured to receive and to guide a strap along the second end of the baling chamber to facilitate surrounding the bale with the strap, wherein the rear door is slidingly coupled to the one or more rails and is configured to move along the one or more rails between a closed position in which an opening at the second end of the baling chamber is blocked and an open position that enables the compressible material to exit the baling chamber via the opening;