The Night Rider playfield schematic shows the rectifier board J1 connector positions for those wires: (click the first image to zoom in)

1. Red is the G.I return (ground)
6. Yellow is the 43VDC solenoid bus
7. Blue is the 5.4VDC feature lamp bus
8. White is the 7.3VAC G.I bus

The first picture in your post with the half red IDC connector shows the white, blue and yellow wires in the correct position.
NOTE, you have the pin numbers counted backwards in your post. See the bottom diagram of the rectifier board for the pin number locations.

NightRider_Playfield_Schematic.jpg
RectifierBoard_Pins.jpg

The wire colors and routing were less documented with KR, however they did not change much with other games. Pull the Mata Hari schematics and you can follow them.

I am new to this. I am assembling a SS Night Rider machine and can't figure out the wiring for the left drop target. I have a switch bank on the bottom (of both left and right) but one on the side of the left. I cannot find a corresponding wire. I don't know where, or what color to look for. Thanks

Post pictures of both the left and right drop target bank switches and we can tell you what wire colors go where based on the schematics.