Could those be het pied markers: hmm.. no. Het pied markers, as Steph stated are often found on the later part of the snake, close to the vent region going to the tail.
Could that snake be het pied: hmm.. possibly if you purchase it as a het from a reputable breeder.
Bottom line, not all het pieds show the markers. Normals that arent het for anything often shows the markers.
But I would love to see a full body picture of that snake. Lucky you to have purchased such big female pastel on that price. Good luck on your breeding project w/ her.