Are you speaking of the hydraulic leveling jacks? If so, all those extra holes are for adjustment of the system when installed. It is made to fit on a variety of trailers, you can add more nuts/bolts if you want, but would be overkill...if you do, be sure they are up to the task of handling the weight, otherwise you would be wasting your time.
TV: 2015 F-350 DRW, CC, 4x4, with 14k GVWR package, 98 gallon TransferFlow Aux Tank, Timbren Shocks
TH: 2014 Voltage 3950, Sailun S637 all around