This evaluation board has 2 copper pads associated with REF and OUT that are about 1/4" square. Each pad has 6 through holes, diameter=120 mils. What can they be used for? Specifically, what component can I mount/solder thereon. Please be specific and if possible point me to a product I can purchase. I am confounded by the apparent lack of SMA/SMB access to the output of the InAmp DUT.