I've searched, unsuccessfully. Not necessary, obviously, but would be nice to be able to activate that droid.

Click on the glowing tablet thing on the computer station.

There is few of them, but don't expect to complete the bonus mission. I did the chapter on multiple characters, managed to get the droid and find other stuff, but I never got the bonus mission anyway.

Click on the glowing tablet thing on the computer station.

 

....in the same room as the droids are. I frequently found them either to the right or left of the rack of Skytroopers.

It is a book on a computer console in the GEMINI ship. The map of the area is is titled "BattleCruiser: Command Deck" Map should show a central corridor (with a separation in the middle) with additional rooms branching off above and below. The device is in the third branch from the left above the central corridor; you enter the area and look for a computer console on the left. The player co-ordinates are: -210, -208 if you bring up the map, jump in place using the spacebar and look at the top left of the map.

 

Why did I bother with providing such detailed answer at such late hour? I spent a lot of time looking for it, both in the game and online.

There is few of them, but don't expect to complete the bonus mission. I did the chapter on multiple characters, managed to get the droid and find other stuff, but I never got the bonus mission anyway.

 

this might be a bit outdated, but i just finished the bonus objective just by visiting each bonus area, didnt do anythign except picking up the bombs