Obi-Wan: Anakin did not take to his new assignment with much enthusiasm.
WINDU: It's very dangerous, putting them together. I don't think the boy can handle it. I don't trust him.
Who exactly is "them" here? I am pretty sure grammatically, that 'them' could refer to "assignment" and "enthusiasm".
Source: Star Wars Episode III - Revenge of the Sith (2005)