Arca peeked through a stuck door, the engine room door. Inside was a rebel battalion commander of some sort. The commander said an order to someone arca couldn't see, and planted time bomb(s).
When the commander bent down to plant the time bombs arca knew he had to run before the soldiers found him as they ran out.
Whispering "thank you" secretly to the commander for doing his job for him, He ran off.
Put your fear behind you where it belongs, then blast everything in front of you into splinters. You'll do fine - Jango Fett
Smart people are weak. Because they don't need to be strong because their smart enough not to fight. - Me