I need help again lol

[chevy4x4girl]

Ok so I finished installing my lift this weekend. Now I just need to finish the small details. One brake line is pushing up against the leaf spring and I need to replace it. Trouble is I dont know how to remove it from the drum back. I has a weird round thing it goes into not a nut or bolt. What tool do I use to remove this? A line wrench? Heres a pic of it http://pg.photos.yahoo.com/ph/prince...5b.jpg&.src=ph

Second I need to bleed the brakes and it says in the manual that I need to hold open the hold the combination vavle open by pushing in the metering pin. What is the metering pin? Heres a pic of my combination vavle as well:
http://pg.photos.yahoo.com/ph/prince...c2.jpg&.src=ph

Thanks in advance