We received a set of RT7 walkie talkies. They came with a USB cord for programming. Where does the other end of the plug go? There isn't a place on the units for this.

Here is the link:https://www.retevis.com/resources-center,you can get the software here. Here is the blog:http://blog.retevis.com/how-to-program-rt7-software/.
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