Did you use "fazrah_cruiser1.X"
instead of "fazrah_cruiser.X"?
The 1 is important.
Most probable reason is that you made your slots with a typo in the slot type. Thus making them a custom slot, and only components with a similarily typoed "Placement Locations" entry can be placed in them.
Overall, I suggest you use the P&Nism mod as a base rather than stock
Tons and tons of small things better.
For example, crew quarters adding to crew capacity (and hull repair), and increasing the lifesupport requirements of the ship