As an owner of the AudioPro Addon C10 I can confidently say it is in no way designed, or intended, to work with an integrated amp such as the 6000a Play, as it has its own inbuilt amplification and streaming functionality. But as a standalone device, primarily designed for streaming services, it is very good, and can be used in a stereo pair, if you buy two. The mk1 is approximately £220 on Amazon.
Also the 6000a Play already has Bluetooth, so the Wiim Mini mentioned above would not be required, unless the ‘Play Fi’ aspect of the 6000a Play, doesn’t work well with the OP’s preferred streaming source, if there is one.
I’ll wait for clarification from the OP before making any further recommendations, but like others have said, probably best to sell what you have and start again.