Sir… the “cleaning guide” here on this forum is not a “AMT activation method”, its a guide when the CSME Firmware partition gets corrupted and we need to -re-initilaize the FW Engine to original OEM factory state, still the guide has usefull information on how to deal with it and the correct use of Intel FIT and image generation.
I do believe what you need is to follow the initial Plato guidance on this thread top posts…
And from here im not, as i said previously, the best user to guide you.