This is how Mac reunites with Wilco goes in Spoils of War.
[Mac sneaks off one of Dooku's war chests as a trooper aims at him, but Wilco stuns him as he faces Mac]
Mac Grimborn: Captain Wilco?
Captain Wilco: General Grimborn? I... I thought you were dead.
Mac Grimborn: Do I look dead? No, I survived. [sighs] It's good to see you, pal.
Captain Wilco: Good to see you too, general. Come on, this way. I know a shortcut.
[Mac follows Wilco to a private camp as they sit down]
Mac Grimborn: Wilco, why are you doing this?
Captain Wilco: Because I needed to find you, sir. To warn you. This orb sees things before they happen. It's foreseen you killing an Imperial officer.
[Mac gets shocked as the orb shows a confrontation between Mac and Hemlock]
Mac Grimborn: Sorry, Doctor, but your experiments end now. [shoots Hemlock as he falls a long way down]
[As the vision ends, Mac becomes horrified]
Mac Grimborn: Oh, no. [sighs] Then my team and I were meant to fight against the Empire.
Captain Wilco: Sir, Lama Su implanted an inhibitor chip inside your brain.
Mac Grimborn: A chip? I have to warn the others.
Captain Wilco: Sir, that chip in your head makes you a threat to everyone around you, even your own squad. I was able to control it, and I can help you get it out.
[Back in the container, the others are getting worried]
Omega: Mac's been gone for a long time.
[Mac suddenly appears with Wilco]