1988 Dodge Shadow what is it ?

I found a leak in my heater hose line. But i don't know what the part is.
The heater hose connects to a elbow shaped plastic piece, which turns the one line in to two and feeds in to the firewall. This is the part that broke. My manual does not mention this part at all. Would like to know what this piece is call so i can replace it. ( i.e. it is located next to the brake booster.)


thank you. steve