Question Case fans won't light up

[AimanS]

So a few days ago, I ordered 3 x 120mm Metallicgear Skiron RGB fans to pair it with my new asrock b450 steel legend and phanteks p400a drgb black. The thing is, the 3 fans that came with the case lit up just fine. It was connected to a fan hub and the socket that I think is for syncing? Are all connected and the led male socket is connected to tecware leds that had a female socket. So about the 3 120mm fans I added to improve airflow, I already connected all of it to 3 of the motherboard's chassis fans 4 pins connector and the other connector,, i connected it with each other like the fans that came with the case but it wont light up. Only those 3 that are not included with the case wont light up. Please help me.

 

[JohnBonhamsGhost]

your new 120mm fans each have a separate RGB cable?
do they have some type of included hub that all three can run through that then connects to a single RGB port?