code: func (h *Health) Connect(service, tag string, passingOnly bool, q *QueryOptions) ([]*ServiceEntry, *QueryMeta, error) {
  	var tags []string
  	if tag != "" {
  		tags = []string{tag}
  	}
  	return h.service(service, tags, passingOnly, q, true)
  }
docs: // Connect is equivalent to Service except that it will only return services
  // which are Connect-enabled and will returns the connection address for Connect
  // client's to use which may be a proxy in front of the named service. If
  // passingOnly is true only instances where both the service and any proxy are
  // healthy will be returned.