Good afternoon Mossy! It was the full head of a suckling pig marinated and deep fried in olive oil and was excellent. Cheeks are one of the best parts of the pig!!!! Kinda a cross of chicharrones(pork rinds) and bacon with the skin.
As far as the skinless older ones, people use it for the head meat. Cabeza in Spanish is head. They're mostly braised in liquid or lard and the meat picked off. Sounds funky, but very tasty if done right.
In "real" Mexican restaurants in the US. cabeza is somewhat popular, but is usually cow head. ?They are braised, the meat is picked off. The best is when it is grilled after as it caramelizes in its own fat. The edges get crispy. Yummy!