Connect Mongo Source Connector to externalDB

I am trying to create a Mongo source connector using Docker. In docker I have created mongo1 and mongo1-setup containers as shown in the official tutorial setup. But I when try to exec this mongo1/bin/bash, it gets connecting to localhost only. How to connect to external MongoDB server ? below is my docker-compose.yaml code

mongo1:
image: “mongodb-kafka-base-mongod:1.0”
container_name: mongo1
ports:
- “27017:27017”
build:
context: .
dockerfile: mongo.Dockerfile
command: --replSet rs0 --oplogSize 128
depends_on:
- zookeeper
- broker
- connect
restart: always

mongo1-setup:
image: “mongodb-kafka-base-setup-mongod:1.0”
container_name: mongo1-setup
build:
context: .
dockerfile: mongo.Dockerfile
depends_on:
- mongo1
entrypoint:
[
“bash”,
“-c”,
“sleep 10 && mongosh ‘mongodb://username:password@mongoexacmpl.com/?directConnection=true’ && sleep 10”,
]
restart: “no”