I've got a 3070 micro that had no Wifi in the first place. Now I want to add a Wifi Card in the M.2 slot on the mainboard. But where in the manual it says are holes for the antenna connectors, are no holes in my unit. How could I get Wifi with my Optiplex, except for a USB Wifi Stick? I could drill some holes - but I don't want to do that. There only comes to my mind that there are Wlan Antennas for laptops that are like very slim plates at the end of the cable and get taped to the chassis. But wouldn't the signal be very weak due to the metal chassis thats between the antenna and the outside?

Do you have any experiences here and could help me? Or maybe there is another way to use common sized antennas that I didn't think of?