Regarding EcoTech battery backup

[Justin D]

Hi when hooking up the ecotech battery backup booster cable does the green led light on the booster cable face the battery backup or does the green led on the booster cable face M2 controller?

 

[Justin D]

Hi when hooking up the ecotech battery backup booster cable does the green led light on the booster cable face the battery backup or does the green led on the booster cable face M2 controller?

Does anyone know the answer