Can someone confirm Kingpin or Jigsaw?

[Burninfate]

Breed it to a Mojave..... If you get a pure white BEL you have a Kingpin and if you get a grey headed BEL you have a Jigsaw.

What did you buy it as?

The snake was a gift from another person that owns snakes, he stated that it was a jigsaw. Do i need to breed it with a Super Mojave? I am new to this, all i know is that means both parents of that snake was a Mojave. What are the chances of getting either a pure whit BEL or a grey headed BEL in the first clutch? Also... What is BEL stand for?