Opencart integration with Collmex ERP system

Hello,
I use OpenCart 1.5.3 and a German ERP system called Collmex.de
Collmex provides an API for integration to the transfer of orders from online stores to Collmex.
My question now is how can I integrate Oppencart with Collmex with this API from Collmex .de ?
Enclosed please find the API : https://www.collmex.de/cgi-bin/cgi.exe? ... ueberblick
The Integration will be with the API and CSV-Orders and "CURL" but i have any idea how can i integrate it.
The file included is the CSV-Orders from Collmex

Any idea?? or help??