If you are looking to add a gateway to Huobi instead of Poloniex, then the best first step is to contact Huobi support. They will be able to provide you with more information on how to add the gateway and what steps are necessary to do so. Additionally, they may also be able to provide you with any additional information or resources that may be helpful in setting up the gateway. It is always best to contact the support team of the exchange you are looking to use for the most accurate and up to date information.