The park (assuming park version) routing tool Amey's offering up is good, magnet one end, pull that through with a magnet, barb the other end you push securely into the end of the hose, as long as it's not the poorly finished hole of a diverge fork it's easy.
The park (assuming park version) routing tool Amey's offering up is good, magnet one end, pull that through with a magnet, barb the other end you push securely into the end of the hose, as long as it's not the poorly finished hole of a diverge fork it's easy.