What's the correct order to turn my bike on/off with the Ranger?

When turning on your bike with a Ranger mod, it's important that you:

1. FIRST, turn on the stock battery
2. SECOND, turn on the Ranger battery

When turning off your bike with a Ranger mod, it's important that you:

1. FIRST, turn off the Ranger
2. SECOND, turn off the stock battery

What happens if I plug them in the wrong order?