I'm not positive, but i think you just drill holes the size of the pins and then screw them into the deck, its aluminum so its soft enough for the pins to thread into it.
You can just thread some crews into aluminum but I am betting you would strip the heads out of suck pins since they are so small. It doesn't exactly thread like butter.
You don't need a tap, just thread them in. You have to get a pretty good size hole in relation to the pin though, not too big and not too small. It's a delicate process.