That only applies to late ALHs, he has a BEW.
The four glow plug wires are all black, but with a colored tracer. Red, blue, yellow, and green IIRC (I do not have one in front of me). You just splice into the engine harness wherever it is convenient to make a good connection. I only use the specified heat shrink crimp tube connectors (the dealers sell these, but they are widely available elsewhere). You should use the correct tool for proper installation. I use a ratcheting type, works great. And of course a heat gun to seal them up. The cheapo wire crimpers do not work.
I usually just splice in right near the fuel temp sensor, where those wires come out of the harness. But if yours has been previously worked on and there is simply not enough left to attach to, you'll need to pull out some of the harness to gain clearance, and unwrap some of it to expose these wires. The new bridge gives you plenty to deal with on that end. You can even go all the way to the glow control unit in the cowl if you really have to, and make your own overlay harness, and tuck it in alongside the main harness.
