Blowing 80 amp fusible link for Battery.

When replacing an old battery the 80 amp fusible link for the battery was blown. The case for the link can house 2 fuses one for the battery (Top) and one for diesel (bottom). I only have the fuse for the battery since my truck isn't diesel. There are 4 wire sets two are white and connect to the left side and 2 red and blue wires on the right side. One is a single wire the other is a double wire. What I need to know is which set is bolted into the fuse itself and which is bolted into the empty fuse slot? I didn't think to look at the location of the red and blue wires coming into the right side of the link when removing the wires to replace the fuse. I have tried both locations and continue to blow the fuse. At $12.00 each it is getting very expensive.