I’m not sure what you’re asking here.
If you are asking whether the basic MM SysEx command set is documented then, yes, it’s in the back of the manual. The details of the data structure in the kit messages etc are available from Elektron support by request:
http://www.elektronauts.com/t/send-receive-patterns-with-sysex-documentation/16810
The MM and MD have exemplary SysEx implementations. It seems to have not been such a high priority for the black machines.