iirc, according to suvi... the geth created, not simply converted a mass relay and turned it into ftl scanner. if that's true and not a typo or something, it's likely that it would have to be on the edge of or perhaps just beyond the boundaries of the milky-way. like an actual telescope needing to be away from light sources and atmospheric interference for maximum effectiveness, that's why observatories are almost always in high elevations in the middle of nowhere. if that's the case you might only need to intercept the transmissions, not raid a geth server node, or the facility might be unmanned or um... un-platformed? so just hack and reprogram or whatever?
i actually have no idea about any of that stuff, just taking shots in the dark based on what little i actually do know about similar, though likely unrelated knowledge.
