The city light usually is in the main headlamp area, just below the main bulb (H4), I believe. If it isn't there, you probably dont have it.
The light next to the main light is the fog light (H3).
N35 (Daytime running lamp control unit) is suppose to be in the Driver's footwell, behind lower dash panel.
The diaphagm is for the light beam level adjuster, which is controled by a rotary switch on the dash (you must install the switch and route vacuum lines to the lights). You can then adjust the lights for different load or road conditions (up or down).
Hope this helps.