We found the problem.
Your wife now can connect the ZUS. Because the ZUS is binding with your wife's email. So you can't connect it.
You can do these things to binding the ZUS：
1）Let your wife to "REMOVE" ZUS in settings page. Then you can connect to this ZUS.
2) You can ask your wife to using "Family Share" feature. When she shared for you, you can connect to this ZUS and you both will see the last parking location. (You can unshare at any time.)