不定式作定语还是同位语

I have the confidence to win.

请问专家：这里的不定式是定语还是同位语？

曹老师便捷的话，麻烦曹老师解答一下，谢谢!

I have the confidence to win.

我感觉可以理解为同位语，由于可以转化为同位语从句：

I have the confidence to win.

= I have the confidence that I will win.