I got my "new" Lentar enlarger refurbished and put back together, but what are these two small diameter, round handles on either side of the enlarger's head w/ a 90 degree bend? There wasn't any sort of manual or info online. The handles have knurled nuts on them where they attach to the enlarger head, but as far as I can see they just screw in to blind holes. The chrome horizontal bar on the front is for the neg carrier, it doesn't have anything to do w/ those two....whatever they are.
