Tandon TM602S Operating And Service Manual page 13

The recommended mating connector for PI is a 3M ribbon
connector, pIN 3463-0001, without ears.
connection to J2 is via a 20-pin circuit board edge con-
nector. The dimensions of the J2 connector are found in
Figure 6. The pins are numbered 1 through 20. The even
numbered pins are located on the component side of the
circuit board. The recommended mating connector for P2 is a
3M ribbon connector, pIN 3461-0001, without ears. A key slot
is located between Pins 4 and 6.
2-5