If you have a military issue E6B, on one side of the sliding scale at the bottom is a bunch of grid squares.

Place the center grommet "o" right at the top of this grid on the perpindicular line.

Rotate so that your present position radial is at the top dead center of the compass rose

Each line down the center of the grid is scaled. I don't have one with me, so I am doing this from memory. One side has 15, 30 and 45, and the other side has something else. If you do the math on the number of lines between the numbers, one side is in increments of 3, and the other side might be 10.

Scale out whatever DME you are and make a mark straight down dead center from the grommet. If you want, label this position one.

Rotate the compass rose until your desired radial is underneath top dead center, and once again make a mark with the DME position you are trying to hit. (use the same scale for both problems i.e. if you used the 3 increments for the postion 1, then make sure to measure in 3s for postion 2)

Rotate the dots until position 1 is directly on top of position 2, you may have to move the grommet down into the grid square to make sure the two dots are on top of the same vertical line.

The heading at the top of the compass rose with the two dots aligned vertically is the no wind heading to go from radial/DME postion 1 to radial/DME position 2

Ironically, this was in the old Navigation For Pilot Training book Air Training Command Phamphlet 51-16, and the pencil method visualize the RMI and make the vertical line method was in Air Navigation Manual 51-40 used at Nav School. The Nav book said it may be more accurately solved using the E6B, which was the method taught at Nav School. Pilot Training taught the pencil visualize method which was in the Nav School Book.

If I could have found a whiz wheel, I would have scanned it in with each step, because it really is simple once you see it. I show it to the students today, just to prove how much of a dinosaur I am getting to be, and so they can practice fix to fixes with each other, and one person can be the arbiter of accuracy by judging off the whiz wheel, if they can find one.