How can I transfer CD's saved in iTunes to new iMac?

Hi. I have a stack of CDs I saved in iTunes on my old iMac (late 2013 C02M604HF8J5). I want to transfer these to my new iMac (2020 C02DX4UFPN5T). I'm going to assume none of music on the old iMac which wasn't purchased from iTunes won't be in the could, hope this makes sense.

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