Use APKPure App
Get MOTO E LED Notification old version APK for Android
This application will help you to enable LED notification on your moto e. So you can able to enable LED notification for various actions like Battery Charging,Battery Full,MMC Read,USB online etc...
Thanks to matmutant @ XDA for his idea.
For full details about LED Notification,see this thread:
http://forum.xda-developers.com/moto-e/development/led-moto-e-led-custom-controls-t2951869
Require Root Permission.