This plastic piece that splits into 3 radiator hoses broke and I don't know what it is

Hi, I have a 95 gst. It has no alarm that i know of but when i open doors/hatch it makes the headlights blink for 2 minutes. I think it would make the horn honk too, if the horn worked. I can hear the fuses clicking for both the headlights and the horn. The headlight fuse is out because it keeps...

So i bought this cheap greddy type rs on amazon for my 95 eclipse gs-t, shortly after it gets here i realize there's nothing to attach it to. What am i supposed to do? There's a lack of bov install threads that get into how it attaches. I tried looking...