You haven't learned this reading for 交 yet, so here's a mnemonic to help you:
All the bars are closed so you and your friends are going to drink together in your car (か). You set up a little bar in the back of your car and settle down for some drinks. It's cramped but cosy.
Do you remember the day we drank sake here together?
Then they poured each other a drink, and drank to a vow of brotherhood.
I wonder if one day we'll be able to share a family drink together.