While magnets are a cool idea they are not necessary because Hartford Products sells brake hose sets that can be connected together in the prototypical way. I have many of these brake hoses installed on my cars. It is rather fiddly but they can indeed be connected. By the way, the glad hands and angle cocks that come with these sets are the best looking castings you will find. The look way better than the Ozark ones. Here is a picture of my heavy duty flat car with the hoses installed:
Unfortunately I do not have a better picture right now but if you look closely you will see that the angle cock valve handle is in the closed position. I modified the castings so the valve handles are movable. If I want maximum authenticity I will link the hoses between cars move the valves to open and then leave the valve closed on the last car.
Here is the picture of the kit from hartfords site:
As you can see it comes with angle cocks with a short length of "pipe", valve handles, hose clamps, glad hands, mounting brackets and rubber hose.
Regards,
Eric

Unfortunately I do not have a better picture right now but if you look closely you will see that the angle cock valve handle is in the closed position. I modified the castings so the valve handles are movable. If I want maximum authenticity I will link the hoses between cars move the valves to open and then leave the valve closed on the last car.
Here is the picture of the kit from hartfords site:
As you can see it comes with angle cocks with a short length of "pipe", valve handles, hose clamps, glad hands, mounting brackets and rubber hose.
Regards,
Eric