After several attempts, I can't figure out how to capture the Rebel Crate. My cursor turns to vise grips when it's over the crate, but I can't see it. My mechs can't seem to see it either when I tell them to capture it - walking up to it or jumping over it. I thought it might be inside the quonset hut, but destroying it didn't seem make any difference. It's a Secondary Objective so I can still complete the mission, but I just can't get that crate.
This crate is down inside the mudhole and can not be reached by a mechwalking towards it and capture; only by a unit that can be positioned directly over the crate.
You should not have copters or hovercrafts therefore you can only reach by using a mecht equipped with jump jets. Even then it is achalleneg because there are only tiny areas of land at the edge to jump from or towards.
It is possible but needs some checking for those accessable spots.