The Mobile Project Center has mounting holes in the top allowing you to fasten your jig securely. All you will need are some 10-32 machines screws and nuts to hold it in place. There are nut retainers on the bottom of the table that will enable you to easily tighten your jig in place. If you have any other questions, please let us know.
Here is how I mount my k3.
seems like it should have been designed to be fastened with at least the kreg clamps. I store my K5 in the storage case.