Where I am in the USA, the NEC requires bonding and grounding of antennas. The HYFIX kit doesn't appear to come with components to address this.

You can add a lightening protector before the MobileCM SMA to protect HYFIX unit from lightening surge if you want.

On the building side, if the building has a ground strap/point then you can add a strap to connect from the TNC of the antennae to the building ground strap.