JAKARTA, Dec 16 Chappy Hakim, a retired air force chief who says he knows next to nothing about mining, now heads Indonesia’s biggest copper producer, entrusted to use his connections to guide it through regulatory uncertainty to a renewed contract for its mine. Picking another former military officer to lead the local unit of U.S. mining giant Freeport-McMoRan underlines how pivotal political ties can be in Indonesia, where the firm got its start nearly 50 years ago helped by close relations to late autocratic President Suharto.