Definatly a former SAM site. The number of launchers per site would vary depending on the capabilities of the guidance radar and how many missiles we carried by each launcher. The 6 launcher type were for SA2 missiles which only had a single missile on each launcher. Not sure what type these may gave been.
http://bbs.keyhole.com/ubb/showthreaded.php/Cat/0/Number/258378/page/vc/vc/1
http://www.nawcwpns.navy.mil/~pacrange/s1/usrGuide/usrTgt/UsrTgt22.htm
http://www.google.com/url?sa=t&ct=res&cd=3&url=http%3A//www.acig.org/artman/publish/article_389.shtml&ei=V-MVROqOMqPaqQKO3unTCA&sig2=VVYTEPXmQgY_Aq_MavqhQw
http://images.google.com/images?q=cuban+sam+site&btnG=Search&svnum=10&hl=en&lr=