Good morning,
Thank you Obione and Woololon for your contributions, now I see it MUCH clearer.
Let's see if I can bring this to a successful conclusion
Best regards

Ok,
I have seen people use the metal base of a chassis where the motherboard and the back with the slots for expansion cards and the output of the various PC connectors are anchored. I have one that I am going to use. For the rest of the components I will invent something
Anyway, I hope I don't get a flat tire ;D

You are absolutely right about the off topic, I have been to other forums with section names like "Overclocking and Mod" and I got a little confused. Sorry for the faux pas.
If you think it's appropriate, you could include it in the "Modding" section

Thanks again!