Technical object relationships

How can I establish relationships between two or more technical objects within SAP Plant Maintenance ?

Example: An object consists of different (mandatory) technical parts. Parts can be installed and dismantled. But how can I describe that part B can be installed in part A, but installing part C is not allowed ? Part C however can be installed in part F and part E.

I would like to use Functional locations, Equipments, Assemblies and materials ... but I do not know how to describe these mandatory relations the parts have with eachother.

Please advise !

Thanks in advance, kind regards,

Bas