Step 9Finish the power connection.
Trim the red wire running off of your 9V battery connector so that when it is placed in the center of the cap, it is just long enough to reach the end leg of the switch. Solder the red wire to the end leg of the switch. Solder the red wire that you have just cut off to the middle leg of the switch. Pass this wire through the hole. Next pass the black wire through the hole.
Center the 9V clip in the cap. Make sure no wires are being crossed and fill the bottom of the cap with hot glue so that everything is glued in place. Make sure that you don't put too much glue. You should be able to still attach a 9V battery when this is done.
Be careful not to burn yourself. The glue will be very hot and will take a few minutes to solidify.
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