Here's the skid plate mounted. The blue circles indicate mounting points. The left front yellow circle is for the coolant drain and the rear, center yellow circle is for the oil drain.
You will either reuse the bolts from the original skid plate or get replacements. Being somewhat of a nut, I guess, I spent $1.00 each and got OEM replacements. The bolt size is M8-1.25 x 20mm, which I know you can get from Home Depot, etc.
I had my truck up on ramps, planning to grease as long as I was under there anyway. The plate is fairly heavy and my shoulders aren't that great. I found it easiest to lay on my back and use my legs / knees to push and hold the plate in place while I threaded in the bolts.
I found it worked out best to loosely thread in the two center mounting bolts, (the ones that use the tall brackets), and then loosely do the 3 front bolts followed by the 2 rear bolts.
Once all the bolts were threaded in hand tight, I snugged them down in the same order: middle, front and then rear. I'm not sure what the correct torque spec would be for these - I just cranked them down pretty good.