...
There are two methods for fetching the Helm Charts from ModelOp, either by requesting a tar.gz compressed file of the content of the Git repository where the Helm Charts reside from your ModelOp Account Executive or Sales Engineer, which will be delivered via bucket link.
Via Chart Museum (see here: Retrieving the ModelOp Center Helm Charts from Chart Museum ):
helm repo add moc http://helmcharts.modelop.center --username=<providedbymodelop> --password=<providedbymodelop>
helm repo update
helm pull moc/moc --version=[version]
...