The source code won't give you shit. Even if you have it all, right here, right now:

1. you cannot disable it completely - there's an image of Intel ME, burned into the chipset, which checks for the presence of the ME + AMT in the SPI flash, and it checks for signature. (There's an exception to this, with skylake and above)

2. you cannot run a modified or reverse engineered version of it, unless you have Intel's private key to sign your own binary.

Basically the hardware is tivoized.