Does symmwin use symcli commands for the replacement scripts of bad components? If so, how can I manually do them without using symmwin?
Symmwin does not use SYMCLI. In some cases, SYMCLI uses symmwin but not the other way around.
so it's mandatory to only use symmwin? is it not possible to build any tools for this, around the replacing of hardware?
Yes, the replacements of parts in VMAX storage is currenly only supported through symmwin and by qualified and authenticated Dell EMC support personnell.