So I am trying to connect to my pi over serial. I have never used serial, so I hope what I have is fine. I can't order anything new. I have a USB to serial adapter (RS232 I think, you can check the picture below) and an RS232(i think) connector. I would like to connect the USB connector to my PC(windows or Linux) and the other connector to my pi, and then access the terminal over serial. I have a monitor to set stuff up, and I have PuTTY. I am using a pi 3 running the latest stretch lite image.