A Tutorial for Detectorists: Mount an Enclosed Wireless Transmitter to a Metal Detector, page 4

Cut a Rectangular Hole in Rubber Stopper of Junction Box for a Micro USB Cable

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This is a different view showing the enclosure's position in relation of the armrest. The box is not set too high to be in the way.

The following picture shows that the box does not push against my forearm so that the box would not cause any physical bother or discomfort during metal detecting.

The next step is modification of a rubber stopper through which a micro USB jack must be pulled every time you plug it in or unplug from the transmitter. A picture shows that the jack is positioned in the upper semicircle of the cable entry.

Such a position of the micro USB jack requires making an off-center hole in the stopper. And since the jack's section shape is rectangular, the hole also must be rectangular and measure 10 x 6 mm (the section's dimensions), so that the jack would not be loose in the stopper. I marked the micro USB socket's approximate location on the stopper with a plus sign, and marked the rectangular shape around it.

Then I used sharp manicure scissors to cut the rectangular hole precisely according to a marked pattern. First I pierced a middle point of each line and then carefully made cuts to the line's end-points to avoid overcuts.

This is what the cut rectangular hole should look like. A cutout piece should be saved for making the same holes in spare stoppers replacing the worn-out ones in the future.

The micro USB jack should fit snugly into the stopper but not too tight for the stopper to slide over it.

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