WIFI antenna wires?

I’m in the process of getting this 2008 Mac Pro fully running as an editor for my old home movies. I want to use as much factory stuff as possible, and I need WIFI. I cannot seem to locate any antenna wires. This unit did not come with wifi from Apple. Do they not include the antenna module? Also, do I need to stick to the airport card that came with this machine or is it upgradable?

I’m in the process of getting this 2008 Mac Pro fully running as an editor for my old home movies. I want to use as much factory stuff as possible, and I need WIFI. I cannot seem to locate any antenna wires. This unit did not come with wifi from Apple. Do they not include the antenna module? Also, do I need to stick to the airport card that came with this machine or is it upgradable?