I've seen this before, and maybe it has been linked here in the past.
I'm trying to find which head shape and scalation pattern best represents what Wallace has.
I'm a little confused that they list the group from "right to left" instead of left to right. (black and white drawings)
However in the boxed in area above the drawings they list (top to bottom) which seems would be a "left to right" reading if you were looking at the heads drawn below.
http://reticulatedpython.info/h4.html
This is a very young version of Wallace but his head seems most like a combo of the 2 heads on the right.
You need to blow up the photo a bit to see better but I'm not expecting a total match to any of those heads. I'm dealing with large percentages of SD Dwarf and a much smaller 18% of mainland.
See where your snake fits in.