I want to add a rear tail light to my bafang mid drive kit. I like the idea of having the light run off my existing battery. My question is , can I install the rear light only to run off the display or is the thumb pad needed to control the light. Really don’t need a horn or even the turn signals. Just the front and rear light. Also would like to avoid another thumb pad on the handlebar. I’m not that savvy when it comes to rewiring,etc. if it can’t be done I’ll probably just install a usb light on my rear rack. Any advice is appreciated!