The best way, of course, to rethead a serger is to tie the thread to the existing ones.

Once in awhile, however, the threads will break and I have to do it from the beginning.

I had a horrible time with the last couple of steps on one of the threads, so -
I learned to poke a stiff thread 'from the top' when a thread would break through the 'arm' that had two holes in it - and connect it about halfway through to the thread that I had started threading from the spool. Then I would just pull that thread back towards the needle(s).

For the life of me, I could not get the serger thread to go through those two holes. Maybe beading wire would work, too?

Does this comment make sense to you?

Since I quit sewing clothing and rarely do any home dec, my cover lock and over lock sit in the back of the closet. They are both Pfaffs and difficult to thread which quickly dampened my enthusiasm.

At this point I am completely talked out of getting that serger!! I think my overcasting on my sewing machines still does a good job and will continue to use that when needed. Thanks so much for all your comments. I do appreciate all the help. Saves me money, and mostly frustration!