I got to mission 18 and can't seem to figure out how to make the Behemoth salvage something instead of firing missiles at it. Anybody had more success than I at it?

It's all in the range. Get close enough to debris or wreckage and Behemoth will automatically salvage it. If you're too far away it shoots missles.

Automatically, like, I don't need to hit the button? 'cause I snuggled up pretty close and was still firing missiles.
Ah, figured it out. I needed to use Tab to target the salvagables. I'd spent most of the game using right click to cycle targets.

I cant seem to trigger the beacon. I have salvaged the 4000ej required and im right next to the beacon but nothing is happening.