I am a beginner in PCB design. While using sensors for my project I thought it would be a great idea to connect my sensors using RJ-45 connector and in my device, I'm thinking of using a RJ-45 female connector for PCB. The female connector looks like this:
To make the female connector firmly attached to the PCB board, the 8 pins are soldered to the PCB board. But, besides it, I don't know the use of these cylindrical holders. How to use it?