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Client_ip in tcp mode in HAPROXY v1.7

Hi, we have microservices running behind HAPROXY load balancer. One of the components(TCP component) is based on TCP connections. This component is unable to publish client_ip rather its publishing the load balancers IP(HAPROXY IP) as client_ip.

Below are the frontend and backend section configurations:
frontend tcp-frontend-mqtt-tls
mode tcp
bind : <8883>
log global
log-format %ci\ %fi:%fp\ [%t]\ %ft\ %b/%s\ %Tw/%Tc/%Tt\ %B\ %ac/%fc/%bc/%sc/%rc\ %sq/%bq
tcp-request connection reject if { src -f deny_list.lst }
default_backend tcp-backend-mqtt-tls

backend tcp-backend-gateway-mqtt-tls
    mode tcp
    log global
    balance leastconn
    server mqtt-node-0 <IP_address>:61628 resolvers <dns_server> check inter 1000

global section in haproxy.config

    log local1 info
    user <username>
    group <usergroup>
    maxconn 64000
    spread-checks 4
    tune.ssl.default-dh-param 2048
    ssl-default-bind-options force-tlsv12

default section in haproxy.config
maxconn 64000
option http-server-close
option httplog
option forwardfor
option contstats
timeout connect 5000ms
timeout client 30000ms
timeout server 30000ms
timeout tunnel 3600000ms
timeout http-keep-alive 1000ms
timeout http-request 30000ms
timeout queue 30000ms
errorfile 504 errorfiles/504.http

I have tried the following possibilities in modifying haproxy.
modification in backend section

        server mqtt-node-0 <IP_address>:<port>resolvers <dns_server> check send-proxyv-v2
        server mqtt-node-0 <IP_address>:<port> resolvers <dns_server> check send-proxy-v2-ssl

After modifying the haproxy TCP component is polling with below error
TCP Component logs
[2020-09-08 18:44:28.188] ERROR mqtt [BrokerService[mqtt-0] Task-13] --- TransportConnector: Could not accept connection from null : java.io.IOException: javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection?

In the TCP component, we are trying to publish the client IP with the following code

Q1. How can we preserve client_ip when the connection is terminated at the backend server.