Begin sewing your wig cap to your braids.
Start at the beginning of your perimeter braid close to the area, and pull on the needle under the braid and throughout the other side, pulling the thread taut against the knot. After that, pull the end of the knot outside a bit and pull the 2 strings apart to expose the loop. Wrap the needle across a single edge of this loop and pull it through the center of this loop to create the base knot.
Quantify about 1-inch down the perimeter braid in the first knot you made, and repeat the process. Hook the needle below the braid, pull it through the opposite side, and tug to pull the loose ribbon tight. Ahead of the ribbon between the two knots has been tightened all the way, however, wrap the needle around it twice near where you inserted it, and then pull tight. This will provide you with your next knot. Repeat this same procedure all the way round the perimeter braid.