Using read only replica for reader role

[sidnaik-ai]

I have the below configuration .
however i want to pass the read replica ip also via the secret hackathon-db-read-credentials usign secret template
PQ_URL: "host={{.Host}} user={{.Role}} password={{.Password}} dbname={{.Database}}"
however i don't know easy easy way of passing the read replica ip from operator .
can i pass it in POSTGRES_URI_ARGS by setting it to read replica ip in operator k8 secret and then using
"host={{.POSTGRES_URI_ARGS}} user={{.Role}} password={{.Password}} dbname={{.Database}}"
what should i use for .POSTGRES_URI_ARGS ?
will it cause any issue if i populate POSTGRES_URI_ARG with read replica ip ? i believe its not used ?

apiVersion: db.movetokube.com/v1alpha1
kind: Postgres
metadata:
name: hackathon-db
spec:
masterRole: hackathon-db-owner
database: hackathon-db

apiVersion: db.movetokube.com/v1alpha1
kind: PostgresUser
metadata:
name: hackathon-db-reader
spec:
role: hackathon-db-reader
database: hackathon-db
privileges: "READ" # For read group privileges
secretName: hackathon-db-read-credentials

apiVersion: db.movetokube.com/v1alpha1
kind: PostgresUser
metadata:
name: hackathon-db-writer
spec:
role: hackathon-db-writer
database: hackathon-db
privileges: "WRITE" # For write group privileges
secretName: hackathon-db-write-credentials