However, the meaning is often figurative and implies wanting only the best part of something or the most valuable aspect, leaving the rest behind.
Here are some examples of how it could be used:
* "Sólo quiero la cabeza del proyecto, no necesito ver los detalles." (I only want the main points of the project, I don't need to see the details.)
* "De la pizza, sólo quiero la cabeza, el resto lo puedes comer tú." (From the pizza, I only want the crust, you can eat the rest.)
* "De esta oferta, sólo quiero la cabeza, el resto no me interesa." (From this offer, I only want the best part, the rest doesn't interest me.)
It's important to consider the context when interpreting this phrase, as it can have different shades of meaning depending on the situation.