I highly doubt that a canvas carport is going to withstand 30mph wind. Does the manufacturer claim that it does,or are you just hoping?
If the manufacturer has provided base plates with screw holes, then these should be sufficient for the design loading (whatever design loading the manufacturer chose). You can try making the carport-to-ground connection stronger by other means, but the carport will just fail in a different way (e.g. canvas ripping or rods bending).
So, if you are happy that the canvas carport itself is good enough for your purposes, then you can just put screws through the foot pads. Make sure the screws are nice and long and are properly anchored in rawlplugs. Or maybe drill and resin-fix anchors in the right place in your concrete, with the anchor bolts going through the screw holes. (Actually, with regards to this, surely you have some sort of installation instructions with the carport, which should tell you how to anchor it to the ground? Unless what you've actually bought is a gazebo intended for garden use and to secured down with tent pegs.)