Wiring schematics for most VMAC products can be found in the Installation Manuals.
Go to https://www.vmacair.com/support/manuals. Enter the first 7 characters of your VMAC system ID and click on the link to the installation manual.
For Multifinction Power Systems, go to https://www.vmacair.com/electrical-schematics and select the link based on the type of weld control box you have and model number of the Multifunction.