I also just snapped this off by levering at the wrong point. So this is just for the IR sensor and the flashing light? If so, I'll just ignore it and happily carry on with life without these two features that I never used or noticed! I've been searching for someone who can do the delicate welding to reconnect the 5 pins but if what you say is true I'll stop searching.
Recommend emphasizing even more in the instructions, the potential for disaster!