help with wiring diagrams

[Morgiee]

Hi guys long time been here ok im helping to build a drift nissan 300zx and the owner has asked me to only put in the bare minimum when it comes to electrical so literally fuel, ignition, crank headlights, taillights, indicators and wipers thats it as all the luxery accesseries are thrown away and no longer needed. However he also wants the indicators, and wiper motor controlling off a toggle switch instead of the oem stalk. So when looking into the service manul diagrams it has a breakdown on the layout/pinout of the stalk switches.

for wipers he wants two two settings (off - fast only) meaning i have to look at this diagram and figure out what wire controls just fast motion and which is off so that i can cut these and attatch to a custom toggle.

My question is im looking at the diagram and cant figure out what its trying to tell me like the lines and circles that go through the grids.

If someone could shed some light on how to understand and read these diagrams i would be greatly appriciated.

Thanks

[Beaniemoo]

As far as I can work out I think it's showing which pins are connected together on certain settings.
So:
Front wiper switch
Off: pins 10 and 11 are joined (presumably for park)
Int: pins 10 and 11 are joined (presumably for park) also pins 12 and 14 are joined (presumably to feed the intermittent relay)
And so on and so forth!
You could confirm this using a multimeter to continuity check the switch in different positions