NestCam Outdoor USB power Cable Shortening Help

I have several Outdoor Nest Cams, that I want to mount very close to outlet boxes, so I don’t need the long cable&adapter.. Can I cut the Cam data cable & wire it directly to a torn down USB wall charger that I plug in to an outlet a foot away.. I assume I can cut the power cord to shorten it, or shorten the data cable & resolder it… But is the round power adapter proprietary? Why do I need that, Can I just cut the data cable coming out of the camera & wire it directly to a small usb wall charger ? I guess I can shorten the data cable & reconnect the bulky round USB end & plug that into the wall charger, but why not skip the round nest connector & wire it directly to the wall charger ? Anyone try that ?, much appreciated..