Outer Limits 4x4 Board

I have an old welding alternater. The sticker says Auto Arc international, Perth. As google has failed to dredge up any info, do any of you know who the company might be if it still exists or better still how to wire it up to make it work?

http://www.vintageprojects.com/metal-we ... elder.html

link in middle of page may help u

This may also be useful.
http://mywebpages.comcast.net/t.molnar/Obwelder1.htm