Posted for "George/Shirley Shattuck" <kloop@plantationcable.net>:

There is a small (3/16 I'm guessing) threaded cap on the top of each
reservoir which is removable with a slot screwdriver.  I don't remember that
it is vented so I think it has to be removed to fill from the brake bleed
nipple.  I initially filled the reservoir from the brake bleed nipple but to
check and top the reservoir it seemed prudent to do it at the pedals.  It
also seemed like a good idea to look around in that area.  But since your
header is not removable the problem is a bit different, not easier.

George Shattuck