Braking being applied would mean controller feels the need to apply brakes, which should only occur if it doesn't want to put current into battery. Otherwise, it would let turbine's alternator dump current into battery.
Having just battery connected, not the shut resistor brake/regulator, would not put any load on the alternator until alternator RPM was sufficient to create voltage higher than battery. So turbine ought to spin free up to some RPM.
If the charge controller was a boost converter intended to take low voltage from turbine and raise it to voltage of battery, then there could be load at low RPM.
In light wind, with alternator disconnected from everything, turbine ought to spin and create voltage.
In high wind, that could cause over-speed and excessive voltage, damaging things. So test in light wind.