This step only needs to be done once. The standoffs can remain attached to the template permanently for subsequent iterations.

Identify the green Assembly Template. It has the part number TD-OCSE-D-AT printed on it.

Note the orientation of the board. The standoffs will be installed on the side that has THIS SIDE FACES DOWN printed on it.

Locate three M2.5 × 10 mm female standoffs.

Secure each standoff using one M2.5 × 6 mm pan head machine screw in each of the three locations shown.

Flip over the completed Assembly Template. It is now ready to be used.