You don't need a spread sheet. Singer 301 and FW needles insert flat on the left and thread right to left all else go the other way for slide plates going side ways. If it is a front loader the needle goes flat on the part to the back most of the time this will work. However there are exceptions, look at the shuttle race the bobbin goes in. The curve of the needle goes next to the hook - true on ALL machines. You can get some clue by looking at the thread guides. It is frustrating when you get it wrong - ask me how I know...