Having had to adjust my shifter for the same problem here's what I did.
In neutral the shifter should be dead center in the gate > left-right/top-bottom. The adjustment is at the turnbuckle over the ZF. One locking nut is right-hand and one is left-hand (with the notches) thread. Rotate the turnbuckle probably about 1/8 of a turn counter-clockwise (as you look at it from the rear of the car) which lengthens the rod towards 2nd and clockwise to get towards 3rd. Start small, even tightening the locknuts makes a change.
Using masking tape on the rods and tunrbuckle scribe a line on all 3 so you know where you've been. Making the adjustment the lines on the rods ahould be in the same spot; only the turnbuckle line is different. Having someone in the car to "Hold" the shifter in posistion when tightening really helps. By the way, first check the tightness on the rod splines under the console ashtray, at the heim joint and the ZF while your at it. A little fiddling around and you should be able to make the proper adjustment.
When I got it I used a silver Sharpe' and scribed 3 small lines on the components to show me where the proper adjustment now is.
Dave
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