Locate the PTFE tube included with the kit. This PTFE tube will be long enough to use on both extruders.

Using a razor blade or hobby knife, cut the PTFE tube in half making the cut as straight as possible to make the tube ends right angles.

You should now have 2 approximately equal length pieces of PTFE tube.

Insert the first PTFE tube into the 2 into 1 adapter as shown in Figure 1

Install the locking clip included with the kit as shown in figure 2.

If you look at Figure 2 you can see that after the locking clip is installed, the PTFE tube is not fully seated into the adapter. After the clip is installed, press the PTFE tube further into the adapter to fully seat it. See Figure 3 for fully seated tube.