Welcome to the forum. If I understand the question, you are seeing this:
When you want to see this:
to do this, you cannot flip the line, instead you must create a new line. To make sure the explode line comes out on the correct side, you must be careful when picking on the axis. The explode line will come out of whichever end of the axis that you select, so to get the explode line coming out of the left hand side, pick the left hand end of the axis.
I hope this helps,
David
From PTC
Editing Explode Lines
You can edit existing explode lines by selecting the explode line and clicking Edit Explode Line 
from the Explode Lines tab in the dashboard. You can also right-click and select Edit Explode Line. You can perform the following edit operations on an explode line:
- Edit the explode line length — You can extend or shorten the ends of an explode line by dragging the handle at the desired end.
- Add Jogs — Select the explode line location where you want to create the jog, right-click, and select Add Jog. You can then drag the jog to its desired location. You can delete the jog by right-clicking its handle and selecting Remove Jog.
Modifying Explode Line Style
You can modify the style of existing explode lines by selecting the explode line and either clicking Edit Line Styles from the Explode Lines tab in the dashboard, or by right-clicking in the graphics window and selecting Modify Line Style. You can modify the line style to be Hidden, Geometry, Leader, Cut Plane, Phantom, or centerline. You can also modify the Line Font and Color. You can always restore the default line style by selecting the explode line and clicking Default Line Style from the Explode Lines tab in the dashboard.
