It's easy, they didn't want to waste money on a new base so the animators used the old one hoping no one would notice.
Finally season 2 starts for REAL! Can't wait to watch this ep. An alls I gotta say about MECH is they are some sick twisted individuals.
Looks freakin awesome so far! Animation looks really good, nice and dark/creepy. I wonder if it's Sillas' whole body in there or just from his torso up? So far in the promo stuff we've seen they only showed his torso basically. definitely pumped for this episode! maybe a little more-so than New Recruit.
Unless it's an exact duplicate of the Op:BB base that LOOKS the same but is in fact miles away from the one Bumblebee was in. Or, more realistically speaking, maybe it's their only base set up to handle Cybertonian technology right now, so it was sort of a forced choice.
Maybe they figure no one will look there. Last place anyone would think they'd be is a local that previously got trashed by the 'Bot's.
What a shame. I thought the 'I'm one of them' line was parts of Breakdown's mind affecting Silas. Oh well. Still looking forward to this episode.