Well usually you go from the spool to a thread guide somewhere on the front - there are exceptions... From the thread guide go down and around the tension. There should be a spring the thread wants to travel in, then around a post or a hook, then take the thread up to the lever with the hole in it and then back down to the needle. If all else fails post a picture. If your tension is on the side rather than on the front you have a Japanese 15 or a 15 clone. We have gobs of info on this thread:
http://www.quiltingboard.com/picture...p-t164361.html somewhere on there are links to manuals and videos how to work a clone. If it is not a 'clone' we need a picture.