Power max converter keeps blowing 30 amp fuses

Thank you for the excellent explanation.

So it sounds like I need to put the rest of the positives onto the one battery on the right and all the negatives on the battery to the left and use the jumper cables to jump them together. I’ll test the white one tomorrow to see what it is.

I put the batteries in the same way but am going to take them out so they aren’t reversed like that. Not sure why I did it like that again.