Need help with draytek log extractor

Graylog Central (peer support)
1

For DrayTek vigor 2862 router logs I use pipeline with following rule:

rule "Draytek"
when
     has_field("message")
then 
     let fields_in_message = to_string($message.message);
     let var_our_grok_pattern = grok (pattern:"%{DATA:UWANTED}\\]\\[%{WORD:mode}\\]%{DATA:UNWANTED}%{IPV4:src_ip}:%{INT:src_port}->%{IPV4:dst_ip}:%{INT:dst_port}\\]\\[%{URIPROTO:protocol}\\]", value: fields_in_message, only_named_captures: true );
    set_fields (var_our_grok_pattern);
end

This rule works great with log message: DrayTek: Local User (MAC=xx-xx-xx-xx-xx-xx): 192.168.x.x:60736 → 195.12.xxx.xxx:443 (TCP)
But this rule does not extract information from there messages:
DrayTek: Local User (MAC=xx-xx-xx-xx-xx-xx): 192.168.x.x DNS → 1.1.1.1 inquire scs.samsungqbe.com
DrayTek: Load_balance 192.168.x --(CAH)–> 195.12.xxx.xxx go WAN2

Please help me to edit rule to extract information from messages.
I’m new graylog user so it’s very difficult to understand syntax and variables.