NAVTELECOM SIGNAL S-2651 Operation Manual page 12

Some cases may require connection of additional equipment not included in the standard equipment set, for
example:
 fuel level sensor;
 tachograph;
 external LED;
 temperature sensor;
 tangent G-2500
 TouchMemory contact key reader.
Figure 7. 14-pin connector of Microfit-14 type with power supply wires
Figure 8. 6-pin connector of Microfit-6 type
Figure 9. 4-pin connector of Microfit-4 type
Figure 10. Interface cable with MiniUSB connector