Unique distributor question

So I've came across a problem getting my turbo 318 to start and went back to the basics. It's operated with mega squirt so it's been a learning process. I've had to lock out and remove all advance mechanisms in the dizzy so mega squirt could control all timing advance/retard. I had to remove the center shaft by taking off the toothed rotor and put it back on. I'm confused now as to how the rotor is aligned on the shaft with the pickup. Right now it's sitting at tdc and the pickup is in the middle of the 2 teeth peaks. Shouldn't the pickup be directly on a tooth at tdc??