yeah, that's exactly what you need to do.
also I noticed you mentioned the C2x NX-01, did you install all of the requirements for that? it does not show up, because it is only a retexture of the Rick Knox NX-01, you still need the original ship to make it work, although I suggest the Ignis NX-pack instead, those models are much better quality and it comes with more variants.
I would also suggest KM1, it comes with just about everything you need to get a modded BC working, as well as some other stuff that is not "sold separately." And it can still be modded.