I machined this line block the other day to replace the original. The original system has a steel pipe connected to the calliper, and a hose between that and the line block. Up top a steel tube was attached to the top of the line block and a hose connected that to the master cylinder. A five part system. The hoses were rotted, so I found a couple of JB1401 rated hoses and deleted the steel tubes. Unfortunately the banjos on the lower hose are on the same plain so to fit it to the original line block required twisting the hose through 90 degrees - not ideal, so I machined up this new line block. The top hose connects to the left side of the line block and the lower hose to the back of the line block, along with the brake light switch.