To keep your pole from shifting with time it is a good idea to mount it on a concrete base that is a little larger than the metal base plate that comes with the pole.
Mark the locations of the 4 holes in the base plate and drill holes to match in the concrete.
Next pound redheads or similar type of bolts into the holes.
Next slide the metal baseplate over the bolts and secure in place with washers and nuts.
Use a wrench to tighten the nuts.
Lastly, screw the pipe into the pipe flange and carefully stack the pole pieces over the pipe.