Maxtor D740X-6L 20.0 AT Product Manual page 30

Installation
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Clearance from the drive to any other surface (except mounting surfaces) must be a
minimum of 1.25 mm (0.05 inches).
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The Maxtor D740X-6L 20.0/40.0/60.0/80.0GB AT hard disk drives operate
without a cooling fan, provided the ambient air temperature does not exceed 131°F
(55°C) at any point along the drive form factor envelope.
   % 1 / $ + 0 # 6 + 1 0 % 1 0 0 ' % 6 1 4 , 
J1 is a three-in-one combination connector. The drive's DC power can be applied
to section A. The ATA bus interface (40-pin) uses section C. The connector is
mounted on the back edge of the printed-circuit board (PCB), as shown in Figure
3-9.
Pin 40
( K I W T G   J1 DC Power and ATA Bus Combination Connector
3-12 Maxtor D740X-6L 20.0/40.0/60.0/80.0GB AT
J1 IDE (40-Pin)/DC (4-Pin)
Combination Connector
40-Pin IDE
Pin 1
(J1 Section C)
4-Pin DC Power
(J1 Section A)
4 3 2 1