I pulled off my 1969 shift coupler and replace the bushings. That was fairly easy but reattaching the coupler back into the transmission to a default position so I won't nick gears, is not clear.

From 101 Projects Books...
1. Have the transmission in 1st Gear.
2. Reattach the shift coupler to the transmission, go ahead and tighten it with that 4mm hex through bolt. tighten about 8 ft/lbs
3. Slide the shifter rod into the coupler but keep the clamped end of the shifter rod very loose.
4. With the transmission in 1st Gear, place the shifter into the upper left-hand corner of the shift pattern.
5. Clamp down on the shift coupler

Question: in step number 4; assuming this is written for 901 Dogleg, so upper left-hand corner meaning the far left hand corner of the reverse shift location? or is this suppose to be pressing in that wobbly upper left corner area in the dogleg 1st gear? Also, if I am making minute adjustments what happens if scoot this adjustment forward or backwards?

Can someone expand what is this step.