Help with trunk trim

I just bought a '73 Dart Sport 340 and have started fixing it up. The trunk has a 3 piece cardboard trim that finishes off the trunk area. I bought new trim from Classic Industries as my car's trim was missing and received it today. I figured out how to install the rear trim, but not the side pieces. I have the FSM but it doesn't address this trim, at least I can't find it. Any help would be appreciated! Thanks in advance.