The 0661-xxx models have the same jumper organization...
0661-371   320 MB, 3.5x1.6, 4317.8 RPM
Performance

Data transfer rate
Buffer to/from media	2 MB/S (instantaneous)
Host to buffer	up to 5 MB/S (synchronous)
Host from buffer	up to 4 MB/S (synchronous)
Rotational speed	4317.8 RPM
Average latency	6.95 mS
Sector time	289.5 uS
Seek Time
Single cylinder	1.0 mS (read)
	4.0 mS (write)
Typical	12.0 mS (read)
	14.5 mS (write)
Average (weighted)	12.5 mS (4 reads /1 write)
Full stroke	25.0 mS

0661-467   400 MB, 3.5x1.6, 4316 RPM

Data transfer rate
Buffer to/from media	2 MB/S (instantaneous)
Host to buffer	up to 5 MB/S (synchronous)
Host from buffer	up to 5MB/S (synchronous)
Rotational speed	4316 RPM
Average latency	6.95 mS
Sector time	289.5 uS
Seek Time
Single cylinder	1.0 mS (read)
	3.0 mS (write)
Typical	11.0 mS (read)
	13.0 mS (write)
Average (weighted)	11.5 mS (4 reads / 1 write)
Full stroke	20.0 mS

SCSI bus terminators
  The drive has no internal SCSI bus terminators. The user is responsible for properly terminating and powering the SCSI bus in the system. 
  AMP part number 88-4163-081-1, DATA MATE DM500-06-8, or equivalent external terminator may be used. 

SCSI interface controller 
The drive incorporated the Western Digital WD33C93A SCSI interface controller and conforms to the ANSI/SCSI interface standard

Jumpers
The jumper block is used to select the SCSI device ID, to control the spindle motor start and to select the appropriate option pin function. There are four ground pins, V, W, X, Y. If the option pin is jumpered to ground, drive initiated synchronous negotiation is disabled, but requests from the initiator will still be accepted. Option block ground pins must only be used for selecting jumper block functions.
   With the remote start jumper in place the motor spins up when power is applied. With the remote start jumper removed the motor spins up when the drive is issued a start unit command.
   During the power up sequence the option pin is interrogated. If it is grounded the pin remains an input. If it is not grounded it becomes an output, indicating motor active or command active depending on the state of the CMDAC bit in mode select page 0.

NOTE: All mounting screws are M4 thread. To be safe, use 4mm long screws for both front and rear mounting holes.