Yes, that was all. It would seem that when the clutch was replaced by a technician recently, he accidentally broke it off. Clutch is kinda close to the control relay, and judging from the corrosion marks of the wire, it was 99% broken off before it, and it just needed a little nudge to break.
A word of advise for all owners of the Bravo-Brava-Marea types:
Even though the rust of the subframework and chassis show no corrosion marks, you should remove the battery and check the adjacent framework! It was a whole mess for my car, the battery tray was already started to corrode heavily, even some holes have formed at critical places. And every wire, connection, remotely metallic part started to corrode around the battery. Everywhere else it's fine, so I take a wild guess and blame it on the battery.
Applied anti-corrosion paint,and hope for the best.
Oh, and you were right, you can dismount the relay without removing the battery. The connections are on the bottom though, so you'll need to be able to get under your car to undo the cable connections, or else you have to take out the battery.