I have just fitted a new upvc front door and now need to refit the magnetic reed switch to it, I spoke to a spotty kid in maplins "probably the manager" and he said that you can only place them side by side with the screw heads facing you which is how it was on the old flush timber door, is this true or can you turn the magnet sideways on the door section as shown in the diagram, the red dotted lines are screws by the way.

I will be packing out the reed switch to the position of the magnet.

Any help appreciated cheers