espocrm/application/Espo/Modules/Crm/Resources/metadata/aclDefs/Task.json

{
    "linkCheckerClassNameMap": {
        "parent": "Espo\\Modules\\Crm\\Classes\\Acl\\Task\\LinkCheckers\\ParentLinkChecker",
        "account": "Espo\\Modules\\Crm\\Classes\\Acl\\Task\\LinkCheckers\\AccountLinkChecker"
    },
    "contactLink": "contacts",
    "accountLink": "account"
}