Off Road Light Installation

How you doing guys?
Im planning to add these to my prius because i have tried different setups of light with no luck
FIrst the HID that came stock with the car died. Then i changed LED Bulbs that did not wotk well. FInally i added regular halogen bulbs and they are ok but really dim i guess the car has just bad lighting.
So i decided to add the ones bellow my main question is if can connect the wiring to to the red prong on the fuse box and then ground to any metal part of the car or do i need to dissasemble the light and connect to the live wire on the headlight?

By the way i live in TX and i have read some of the code regarding driving with these on the highway im not planning to use them in the highway just in the city where is super dark... sometimes i do uber at night...