If you're as dense as a brick as I am, and start and pause this quest to focus on the main story, then come back and run in circles in the blue 'location radius' for 20 minutes fruitlessly, the notes for pickups # 2 and 3 are on purple-ish objects that look like a tool bench or a power relay, and blend in well with the factory scenery aesthetics.
#2 is at the top of the search reticle, on an upper rooftop between two of the taller buildings - #3 is pictured below, around the corner to the left of the 'window strip' on the middle tier
[edit 20150907 - woo inline screenshots now]