whether lights are 6 volt or 12 depends on what voltage bulbs you install, either voltage bulb should be available at your CDN Tire or auto supply .... some 6V light assemblies had sockets that only accept a bulb with one filament, which means adding a separate turn light assembly or getting the dual element sockets to put in your housings - the turn kits are available from most of the vendors [shop Canadian

] and probably even at NAPA .... wire gauges will be shown on the factory wiring diagram in the shop manual or find it
hereBill