Digital BW, The Print

I'm currently  installing a MIS CFS system in my 1280 for the first
time. I just filled the carts using the vacumn pump. Somehow I must
have gotten the black tube above the ink level while filling it
because I  ended up with mostly air in the feed line (the other are
mostly ink).

Can I just use the supplied bottom fill adapter and suck ink out of
the bottle into the line and cart? If so, do I have to wait a few
hours for the bubbles to go out of the ink in the cart before I
install it?
Is it better to do this before or after I install the cart in the printer?

Any other thoughts?

Bob Michaels