I'm trying to understand the following:
I guess this could be generalized as AにBをCさせる.
It's confusing. Maybe if someone can break down how to understand this and then I can memorize it.
Usually, you have a sentence like:
where the subject takes
There is a morpheme
In your example, the subject
Sometimes i process it like this:
(Zが) トムが: Tom
(Aに) 後輩に: towards / unto junior
(Bを) サイフを: take / consume wallet
(Cさせる) 開かせる: let / made + open
= Tom let/made junior open the wallet.