Two L brackets that I purchased more than a year ago, just because I thought they would be handy, firmly attach the pulley to the top of the fork. They are secured in place by the front wheel brake mounting bolt and two of the small bolts holding the pulley components together. I trimmed the rearmost bracket flush with the outer pulley disc but the front one will provide a convenient mount for a headlight and/or a camera. The caliper brake will have to be shifted to the front of the fork to allow its cable to not foul on the main boom as the wheel is steered.
There is a requirement to keep the steering cable close to the main boom at the front wheel end to avoid conflict with the pedals and the e-Assist motor. I had contemplated a small pulley each side of the boom but did not see anything suitable at two stores that I visited at the time. This may have been fortuitous as I came up with a possible simpler arrangement if I don’t happen to find some. This involves using two bearing races mounted horizontally to act as pulleys. The bearings will rotate with the cable action and provide the required guidance. If necessary, flanges could be used to ensure that the cable ends do not run off the pulleys but, due to the short distance involved, I don't think this will be a problem as the cable should not wander.
The headstem that I intended to permanently use was temporarily clamped to the side of the main boom roughly near where it will be installed. The cable was threaded through an already existing horizontal hole at the bottom of it - for convenience if nothing else. One end was wound around the shaft a few turns below the hole, taken to the right hand side of the bottom half of the pulley, with the wheel pointing straight ahead, wound around to the left side, poked through a hole drilled in the plastic in to where its fixing bolt will eventually be, pulled out through the bolt hole and secured under a nearby bolt. A few turns of the remaining half of the cable were then wound on the steering column shaft above the hole in the shaft, continuing the wind direction of the previous wind, taken forward to the left hand side of the top half of the pulley, wound around to the right side and terminated near its mounting bolt in the same manner as the other cable end.
Ignore the horizontal bit at the bottom. It is a remnant from something else.
Now, for the test to see how it would work – or not. The position of the column headsteam was changed to tighten the cable as its tightening mechanism did not yet exist. I was pleasantly surprised at how little effort was required to steer the wheel. It was possible to operate the steering with just a thumb and forefinger rotating the steering shaft. There were two complete turns from lock to lock. Perfect!
I decided it was necessary to devise a means of keeping the upper cable winding separated from the lower. I cut a separating ring from the rapidly diminishing kitchen cutting board, placed it on the shaft, threaded the cable ends above and below it and refitted the cable to the front pulley. Other than being a firm fit, the ring is not secured to the shaft. The cable should always hold it centred. Problem solved.