Install Box Inputs
The button and toggle switch will be panel mounted to the 3d printed box. Remove the included hardware from them.
Insert the cables from the button into the large hole on the side of the box. Press the button into the hole until it becomes flush with the surface of the box. Grab the button's hex nut and insert it through the cables. Twist the hex nut onto the threading of the button. Fasten the hex nut until it's fully tightened. A set of needle nose plier can assist in grasping the hex nut.
Place the toggle switch inside the box and fit the stem of the switch through the smaller hole. Press the stem through so the body of the switch is flush. Insert the washer and hex nut onto the threading of the toggle switch. Hold the toggle switch in place while fastening the hex nut. Fasten until fully tightened. A pair of needle nose pliers can assist in grasping the hex nut.
Inside the box enclosure is a circular clip that is sized for a 2200mAh battery. Grab the battery and begin to work it into the clip. Press the battery through the clip until it's fully enclosed in the box. Allow the JST-PH cable to sit outside the box.
Grab the Feather mounting plate and orient it so the two mount holes line up with the ones on the box. The bottom of the mounting plate should face the side of the box with the mounting holes. Insert the mount and begin to push it inside the box with the USB port facing the outside. Reference the photo to get an idea of correct orientation. About halfway through, plug in the battery into the Feather.
Grab the two clips for the box (bhl-box-clip.stl) and begin to attach them to the box enclosure. The box features a railing that allows the clips to slide into them. Orient the clips with the railing and firmly press it into place. Repeat this process for second clip on the opposite end of the box. If the tolerances are too tight, use a filing tool to loosen them up.
Just as a precaution, go ahead and connect the 3-pin JST-PH cables together and toggle the switch on to test the circuit. The circuit should power on – Make sure the code is uploaded and set to the correct pin on the Feather.