Mark where you want to locate the saw. Check for clearances by dry-running typical lumber through the saw. Check for a comfortable working stance.
Drill four holes through the workbench. Saws typically use 5/16-inch screws, so 3/8-inch holes will work.
Place the saw on the workbench and insert the screws. Tighten.
Mark where you want to locate the saw on the sheet of plywood. The center is best.
Drill holes in the board and countersink. Fasten the saw to the plywood by attaching bolts, washers and nuts.
Clamp the board to the work surface. Check for clearances by dry-running typical lumber through the saw. Check for a comfortable working stance.