Creo Schematics defining parts with accessories

Hi, I am fairly new to CREO Schematics. So far I have been creating parts that come in 1 piece. The next challenge is to define a part with related accessories. Examples are:

- A power switch mounted on a DIN rail with terminal covers and the shaft to connect to the rotator on the door (see image below)

- A relay holder on a Din rail and the relay to plug into it (see image below)

- A terminal block with a jumper to make a connection between the jumpers

The goal is to have all these parts in Creo Schematics to allow outputting a complete BOM of parts with their related accessories.

I am using Creo schematics 10.