改个定语从句

应该合并为:
The soldiers moved the boxes (which/that)they wanted to hide to a mine.意思为: 士兵们把他们想要藏起来的那些盒子搬到了一个矿井里。

最好改为The soldiers moved the boxes (that/which) they wanted to hide to a mine .
还有一种是The soldiers who wanted to hide the boxes moved them to a mine.不知道行不行,呵呵

The soldiers who wanted to hide the boxes moved them to a mine

The soldiers who wanted to hide the boxes moved them to a mine