How do I change the alternator belt. 1990 bmw 735i? Are there parts to remove 1st?

I can easily loosen the adjuster bolt but not sure where the pivot bolt is located or if there is more than one other bolt to loosen?How do I change the alternator belt. 1990 bmw 735i? Are there parts to remove 1st?http://autorepair.about.com/How do I change the alternator belt. 1990 bmw 735i? Are there parts to remove 1st?some models have a idler pulley loosen the center bolt and there should be a adjustment bolt on top