Please go to admin dashboard > "Integration" menu and click to button "Add new profile" to open add new form.
When popup showed, please choose third party system you want integrate.
After choosing profile, please fill all the field in this form.
Then, you can click to button "Send test" to test your information you created and you can click to button "Add profile" to save this info.
After creating new profile, you will see list profile integration like image below
In the listing profiles, you can click to button "Edit" in the each item to edit this profile.
In this form, you can edit your information and click to button "Edit profile" save your change.
In the list profile screen, you also duplicate or delete the profile you want.