Hi,
Believe this is the link for it...
http://www.seap.minhap.gob.es/es/ministerio/delegaciones_gobierno/delegaciones/murcia/extranjeria.html
If you follow signs for Molina de Segura, its quite easy found, no appointments..just every piece of paperwork you can find. Please be careful where you park and dont go alone!!
If you don't speak Spanish well, please take a translator.
Since July last year they need proof of healthcare and finances!!!
http://costacalida.angloinfo.com/information/moving/residency/eu-citizens/
Good luck!!