How to pass dynamically S3url from child to root stack of nestedstack in cloudformation

Child1SG stack: AWSTemplateFormatVersion: 2010-09-09 Description: Basic SSH Child Security Group. Resources:
MySSHSecurityGroup1: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: my new SSH Child SG SecurityGroupIngress:

• IpProtocol: tcp
• FromPort: '22'
• ToPort: '22'
• CidrIp: 0.0.0.0/0

Root Stack: AWSTemplateFormatVersion: 2010-09-09 Description: Parameter store of SG1

Resources: myStackWithParams: Type: AWS::CloudFormation::Stack Properties: TemplateURL: https://cf-templates-o3rmx0wkf9l-us-east-1.s3.amazonaws.com/2022115bE6-Child1SG.yaml #arn

For this template URL how to pass dynamically S3 path of child .