Specify Connector API with query params using zoho.crm.invokeConnector('name', <map of params>)

Specify Connector API with query params using zoho.crm.invokeConnector('name', <map of params>)

Can't pass data to the Connector API.
Writing Related List for my Extension and can't access 'id' and 'key' params in Connector's API:

m = map();
m.put("id", lead_id);
m.put("key", "lead_id");
resp = zoho.crm.invokeConnector("myconnector.mycall", m);

How do I can now access to the  map 'm' data  in  Specify the URL field in my Connector API and than use  as query params for GET request. 
See attached screenshot.
Thanks!

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