Hi Peter,
If you drop the configuration into the config folder, the client should add it to the drop down list automatically. Please note that files should follow the naming convention config-{standard}{optional other characters}.xml, where standard in this case would be “sdtm” or “define”. Also, all XML files in this directory (with the exception of those that have the standard name-component “define”) will always be available under the Custom validation standard, regardless of naming convention.
Regards,
Tim