Sorry, but I'm really having a hard time to understand this following step...

(3. Tape a string to the front wheel and walk with it to the rear of the truck. Measure against the front and rear outter surfaces of the rear wheel. The string should be the same distance indicating the front wheel is are pointing the same direction as the rear. If it isn't, loosen the adjuster on the tie rod and tweak it until the front wheel is straight. You can use a small ruler and easily get to where the distance between the front of the rear wheel and back side surfaces within .125". (1/8) At that difference, the front wheel is toed in/out a whopping .25 of a degree. That's nuttin'. If you wanna be anal, you can get it spot on.)

Where do you tape/measure the string on the front wheel?
Too bad those pics doesn't really help me figuring it out...
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