# Instructions for adding a penetrator

For some applications of the Sounder, a penetrator will be required. We recommend an M10 cable penetrator for 6mm cable available through Blue Robotics. To pass the cable through the penetrator, the JST-GH 3-pin connector will need to be removed and re-installed once the cable is through the penetrator. Instructions on how to do this are as follows.

Pry up on the tabs of the JST connector with a sharp object such as a hobby knife 

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Gently pull each of the three wires individually

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Bend the tabs of the JST connector back down to their original position with the sharp object

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Pass the cable through the penetrator

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Replace each wire into the reused JST connector. Pin 1 is Shield (Yellow wire), Pin 2 is White, and Pin 3 is Black (or Red on newer units)

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Ensure each wire does not come out of the JST connector when gently pulled on

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• If the wire comes out, the tab can be bent back down farther and the wire reinserted. 

• If the wires just won’t stay in the re-used connector, a replacement connector has been provided.