Correct. Set the place you want to mine as Source and the place you want it delivered as Destination. Just remember, when you click on a planet once, it shows you what it produces per hour, not what is there. It isn't until you click on the planet view (the O ) that it brings up the detailed info on the planet, like Population and resources available. So make sure you aren't trying to mine a planet that hasn't produced any ore in the last hour.