I have not dealt with the 80-pin SCSI hard drives........I always ordered the 68-pin variety. For my hard drives currently, I have an Adaptec SCSI card 29160 which is an upgrade from the Adaptec 2940u2w SCSI card I had.
Basically, when I needed more HD space, I was looking on adding a second 37.6 GB HD (my first Cheetah a 9.1 GB). The cost of an Ultra 160 37.6 GB Seagate Cheetah was about $560 (and on Pricewatch the adapter was less then $200).....and of course ordered online, no sales tax. A 37.6 GB Ultra2 Seagate Cheetah was over $800.....I wasn't about to pay more to keep my current SCSI adapter, so bought both the adapter and the Ultra160 drive. (Latter on I found that the U160 drive could run on a u2w adapter, but oh well.)
My 2 HDs are a 9.1 GB Seagate Cheetah (mine's actually an engineering sample, from the second batch of 1,000.....as my old computer was built just before these drives went to the general market), model# ST39102LW. The new HD is a 37.6 GB Seagate Cheetah for Ultra160 SCSI, model# ST 336704LW.
In the case with these, and to my knowledge with any internal LVD SCSI drive, there is no termination jumper on the drive itself. The termination is provided using a special LVD SCSI cable (the active terminator is on the end of the cable). Now, these cables are rather pricey (I needed a longer one when I added the second HD, and the cable was $70. One either neads a twisted or laminated SCSI cable. If one uses a SE SCSI cable, the drive will be forced back into SE "legacy" SCSI mode (detecting this), and won't use LVD signaling anymore. If you get a proper LVD SCSI cable, the terminator is on the end of the cable. You are talking an internal drive, right?