Where can I find how to make my 148gtl a 4 pin? Have one that used to belong to my dad, he sold it and now I got it. Problem is the previous owner cut the little board and 5 pin jack out. Put in a 4 pin but did not wire anything. So I need to know which of the blue, green, red, orange and grey wires to put into which pin, 1, 2, 3, 4. Please help. Want to fix it and give it back to him.