There is a fairing at the rear end (the dark bit in Spikes pic) that is removed when the plumbers load/unload the rockets. you are then faced with a plate with 18 tubes, each tube has a small conector for the firing link (electrical connector from pod to rocket) Like Spike, its been a long time since I had me mitts on one.
I do remember that the fairing on the front end that the rockets were fired through, was called the "heat shield", mainly for HE rockets, but used most if not all the time with practice rockets when I served at RAF Brawdy in the early eighties.
HTH
Andy