1973 240z Custom Wiring From Scratch

I'm all LED except for the dash. I used a couple of these from Amazon for blinkers and emergency flashers and they've worked just fine since I installed them back in 2017.

Amazon.com: VOFONO 2-Pin Electric Flasher Relay, 12V Heavy Duty 2 Pin Compatible Automobile Motorcycle Bike Scooter Fix Turn Signal Bulbs Fast Hyper Flash，Two Prong Round : Automotive