Connection to Laptop is not possible via USB

[dogmatix]

Hello,

i want to connect my Laptop to my headunit (JY-UOS03N4GS) via USB.
I run Windows 10.

Windows doesn´t recognize the connected headunit.
I tried both cables of the headunit, both don´t work.

I enabled developer mode and set USB to MTP mode in developer screen. USB Debugging is also enabled.

It doesn´t work...

Can you give me tips, how i get the connection?