Howww to properly join home stereo components

[Karma13]

would like to join pioneer VSX-7300 with pioneerCLD-D504 with spectro acoustics 2102 and yamaha M-4

 

[WyomingKnott]

And what is the question? They connect with the little RCA jacks or optical cables in the back. I assume that you want more specific information, but what exactly? Want to know if they are compatible, if optical is better than RCA, how to use balanced connections, or what?