For some awkward reason, the Pentaho EE server, still does not come with the Pentaho Marketplace standard enabled. It is not in the standard menu!
While I was getting ready to go through the old manual download in order to put the plugin into the right folder, I dawned to me that the procedure to get marketplace onto your EE install had been made a lot easier. And indeed, when navigating to the Marketplace website, it wasn't hard to spot find the "Find Marketplace" instructions.
Once instructions found, I did notice that for some reason, Pentaho has still opted to hide enabling of the Marketplace in an obscure config file. Not the level of user friendliness I would have hoped, but better than pre-6.
A quick "./ctlscript.sh restart" later, the Marketplace was available on my box