which one should I use in the apple-app-site-association file，Appid prefix or Teamid？

hello, which one should I use in the apple-app-site-association file，Appid prefix or Teamid？

e.g. ， ‘abcd’ is my ‘A’ app's App ID Prefix . And '678ade' is my account TeamId in membership information.

Q1:
In the file 'apple-app-site-association', which one should I use to fill "appID" Value? "abcd.com.A.a" or "678ade.com.A.a" or any one is OK?

The value of the appID key is the team ID or app ID prefix, followed by the bundle ID. 
said in this page : (https://developer.apple.com/library/archive/documentation/General/Conceptual/AppSearch/UniversalLinks.html#//apple_ref/doc/uid/TP40016308-CH12-SW1)

eg. apple-app-site-association
{
"applinks": {
"apps": [],
"details": [
{
"appID": "abcd.com.A.a",
"paths": [ "/","*" ]
},
{
"appID": "cdef.com.B.b",
"paths": [ "/","*" ]
}
]
}
}