Well, you should then be able to figure out what you need from my code on the GitHub page.
The port is 49280 and all the SCP commands are listed in “CL5 SCP Parameters-1.txt”
It’s all text-based, much like OSC, so if you’ve done any OSC or Text-based comms in the past, it should be fairly easy.
Like I say, I can’t send you the docs, but if you contact Yamaha pro audio customer service, they’ll probably just send them to you if you tell them why you need them.
Give it a try and let me know if you have any questions. Good luck!