It's not a bomb. If you connect a live wire to a dead short you get smoke and fried wires in any electrical setup.
As far as I know the two harness' are similar but not really the best way of doing it. You just end up with a butchered mess that someone will curse you for.
Find the correct harness to suit which ever sports dash you have. There are a few variations with small but important differences.
Do you know which dash you have??