Authorize.net - AIM, Adjusting the gateway URL

I'm new to the forum and new to open cart. My current shopping cart is OS Commerce, which as we know is limiting as to the layout.

Anyway, I am working with open cart and think it's a great fit... except for one thing. I've been struggling with trying to find the Payment Gateway in the code for the module.

I need to change the gateway from Authorize.net to a new portal address. My processor uses the Authorize.net - AIM module but an entirely different portal address. My processor is fast charge.

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PROCESSOR INSTRUCTIONS: Locate the Authorize.Net Aim Payment Module in your shopping cart and
change the

‘POST TO’ URL
FROM: https://secure.authorize.net/gateway/transact.dll
TO: https://trans.secure-fastcharge.com/cgi ... horize.cgi
*****************************

Who knows where the actual URL is?

I'm using Open Cart 2.1.0.2

Look in catalog/controller/payment/authorizenet_aim.php

Sorry for the delayed response, this worked! You were a huge help!

Now onto other smaller issues / bugs.