Ok well the pictures below speak for themselves but I'm wondering;
A) Do I have to get the compressor running before I know which of the copper pipes is output and which is input?
B) How do I wire this thingy (note: it has two cables??)? I believe I was reading the book "Das Boot" while we were studying electricity in physics last year

C) Quite a bit of oil was drained out, maybe a few hundred mls, will I need to replace this with more oil and if so what oil will work?
D) What are the best ways of attaching the copper pipes to a hose or something with threads? Will brass compression fittings work (note, if this thing will go to 500PSI, I am taking it to 500PSI)?
Think that's about all the help I need, and yes I did search...just seems everyone has a different type of compressor so it doesn't help that much.