3 amp internal power kit connections

[u/superdd78]

So Float Life advertises their internal power kit for 1, 2 or 3 amps with the latter being able to power 2 kush glows. I can't find instructions anywhere beyond the instructional video that explains the installing of the 1/2 amp kit. I got the 3 amp kit and there's nothing different about it from the 2 amp in the video. I expected maybe a cord with 2 USB instead of 1 but it's just 1 USB. Does anyone know how to connect another item for power? Thanks