Here is the wiring diagram of MKII Lotus Cortina for model year 1969 until 1970. You can choose between left hand drive wiring diagram here and right hand drive here. And for MKII wiring diagram keys are below:
1. R.H. Side Lamp (Front)
2. L.H. Side Lamp (Front)
3. R.H. Direction Indicator (Front)
4. L.H. Direction Indicator (Front)
5. R.H. Headlamp
6. L.H. Headlamp
7. R.H. Front Loom Connector
8. L.H. Front Loom Connector
10. Temperature Gauge Sender Unit
11. Coil
12. Distributor
13. Starter Motor
14. Generator
15. Body Earth
16. Battery
17. Horn
18. Fuses
19. Regulator
20. R.H. Bulkhead Multi-Way Connector
21. L.H. Bulkhead Multi-Way Connector
22. Starter Motor Solenoid
24. Blower Motor Ballast Resistor
25. Heater Motor
26. Back-up Lamp Switch (Manual Transmission)
28. Windscreen Wiper Motor
29. Stop Lamp Switch
31. R.H. Courtesy Light Switch
32. L.H. Courtesy Light Switch
33. R.H. Indicator Warning Light
34. L.H. Indicator Warning Light
35. Ignition Switch
36. Ammeter
37. Oil Pressure Gauge
38. Temperature Gauge
39. Fuel Gauge
40. Instrument Illumiation Bulb
42. Generator Warning Light
44. Instrument Voltage Stabilizer
45. Speedometer
46. Tachometer
47. Clock
48. Turn Signal Unit
53. Heater Switch
54. Cigar Lighter
55. Windscreen Wiper Switch
56. Steering Column Connector
59. Panel Light Switch
61. Lighting Switch
62. Interior Light
63. Turn Signal Switch
64. Horn Switch
65. Column Dip Switch
66. Headlamp Flasher Switch
67. Fuel Tank Sender Unit
69. Rear Wiring Connector
70. R.H. Stop Lamp
71. L.H. Stop Lamp
72. R.H. Direction Indicator (Rear)
73. L.H. Direction Indicator (Rear)
74. R.H. Side Lamp (Rear)
75. L.H Side Lamp (Rear)
76. R.H. Reversing Lamp (where fitted)
77. L.H. Reversing Lamp (where fitted)
78. License Plate Lamp
79. Rod Lamp Relay (where fitted)
80. Tachometer Earth
81. Speedometer Earth
82. Main Beam Warning Light
83. R.H. Road Lamp (where fitted)
84. R.H. Road Lamp (where fitted)