Using a pair of vise-grip pliers, c-clamp, or an extra set of hands, apply pressure near the middle of one of the short edges of the assembly (be sure not to cover up the counter-bore for the 6-32 x 5/8" Socket Head Cap Screw)

With the pieces clamped together insert a 6-32 x 5/8" Socket Head Cap Screw into each of the hole in the centers, and nylon lock nuts in the corresponding nut traps. DO NOT TIGHTEN just engage the threads into the nylon lock nuts.

Install the final two (2) 6-32 x 5/8" Socket Head Cap Screws in the remaining locations on the long edge of the assembly. You can now tighten the (6) 6-32 x 5/8" Socket Head Cap Screws in a star like pattern

This completes the assembly of the Flexible Resin Reservoir