I used to run a McLeod HTOB setup and I agree with Tim's opinion that the fittings generally don't leak. ... Since it sounds like this is your first experience with this setup, let me offer a few tips. First, be sure to secure the hoses inside the bell housing so they don't come into contact with the spinning pressure plate. Second, be sure to have a clutch pedal stop that will prevent you from overextending the HTOB. If it is pushed out too far, it will likely leak. Third, any fluid that leaks within the bell housing may get on the clutch causing it to slip. That requires pulling the transmission to inspect the clutch and repair the damage. For that reason, I abandoned my HTOB and went with a clutch fork actuated by an external slave cylinder. ... Good luck with your project.
P.S. You may find this old thread regarding clutches interesting:
click here.