Solved! Unrecognised port on my lenovo Y520

[9amk]

Hi,
Recently i have been thinking about making an gaming laptop monitor setup, where I connect my laptop to an external gaming monitor. so i have been looking around my laptop ports to see which cables i would need and i saw one that’s not listed on my laptop ports specs. i will attach a pic of the port, If anyone recognise it please tell me.

link to the pic:
https://ibb.co/9W7nMYT

Also i am wondering given my choices of ports what would be my best way to connect to an external monitor.
Two USB Type-A 3.0
One USB Type-A 2.0
One USB Type-C (no Thunderbolt 3)
One RJ45 LAN Ethernet
One HDRMI
3.5mm jack
SD card reader
Audio jack
Microphone jack
Thank you all

 

[helpstar]

edit:
HDMI and USB-C/DisplayPort 1.2 are the only ports you can use with an external monitor

The one from the pic is a Kensington lock and no port