A fixture for an elongate structure includes an extension module having a housing secured therearound. The extension module includes a longitudinal body portion having first connector and a second connector. One or more access ports extend through the longitudinal body portion and into an interior area of the longitudinal body portion. The extension module includes a first seating surface and a second seating surface. The housing includes a first axial cover extending radially and a second axial cover each extending radially outward from the longitudinal body. The first axial cover and the second axial cover are axially spaced apart from one another and define a space therebetween and around the longitudinal body portion. A circumferential cover extends circumferential around radially outermost edges of the first axial cover and the second axial cover and surrounding the space.