Let there be light
I didn't get to check,but I can tell you that's not unusual. If you did unplug a harness by accident, the other side would be right there easy to see- don't go nuts looking for a male that doesn't exist! You could've shorted out when you were installing the blinkers, have you checked to see if you popped a fuse? The only weird thing is I don't BELIEVE the FZ shares a fuse, I think it's got one for the blinkers and another for the headlight. But hey, it wouldn't be the first time a misplaced screwdriver or bit of wire blew a neighbors fuse, that's definitely where to start. Then whip out the multimeter I guess, maybe check the switch for the headlight for function, although the odds of a switch going bad or a bulb dying on a new bike exactly while you change the signals is less than likely.