After configuring the Leadsquared Package in Salesforce , in the Mapping Section(Lead Mapping, Contact Mapping, Activity Mapping) Salesforce and Leadsquared fields are not generated by default. Please look the below screenshot for your reference.
After configuring the package, we should change the below settings;
1- In the Default Remote Site Settings, change the Default Url(https://api.leadsquared.com) to your Host Url according your area(Eg. India-> "https://api-in21.leadsquared.com". Please check the below screenshot for your reference
2- Add another new Remote site settings with the below Url in "Remote Site Url" as shown in below screenshot.
Remote Site Url:: https://leadsquared.ap5.visual.force.com
After making the above changes refresh and Authenticate with your API Access Key/ Secret Key and by default fields will be generated as shown in the screenshot.