a connecting system can couple two waveguides to one another , wherein each of the waveguides comprises a flange or a protruding rim . when the waveguides are connected together , the flanges can face one another in an adjoining arrangement . the connecting system can comprise two members , each having a groove , recess , or slot that receives a circumferential area of the adjoining flanges . the two members can be disposed on opposite lateral sides of the waveguides with each groove embracing a peripheral area of the adjoining flanges . a fastener or another apparatus can bring the two members towards one another , thereby causing the flanges to move deeper into the grooves . that is , the two members can clamp around opposing sides of the flanges . in response to the flanges moving deeper into the grooves , the sidewalls of the grooves can compress the flanges together to attach the waveguides to one another .