how to add to baseURL some arguments?

I'm having a link like baseURL: 'https://www.aaa.com/CPC/?agentcode=123&hotelcode=123',and if i'm using the value from baseURL, it cuts it to https://www.aaa.com but I need to navigate to page from baseURL, using the whole URL which I expect, as I understand, baseURL is doing its job and works properly, but anyway I need somehow to add everything what goes after .com part also. How can it be done ?