Can anyone help me with my question?

Hello!

I have a Dell Vostro 15 3530 laptop
MAINBOARD LA-M366P

Can I add HDD to the laptop, is it enough to install the connector or do I need another harness? Visually, the harness is already installed.

In the BIOS, HDD SATA is supported and it can be turned on and off, but by default the connector for the cable is not installed.

And what is SW1 next to the HDD connector for?​

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