Yesterday i bought a SCSI Hard Drive, but don't watch on connection of this HDD, on my hard Drive that was before are 80-pin's (ST318453LC), but on this (like google says) 40-pin's (ST3300007FC). Can someone give me Idea what to do

???? Please Help me ! BTW, i can't Change or sell this Hard Drive, and if you know what I need to buy, give me a link, where to get that... Please !
Sorry for my English
