That 12V/10A you are referring to are the little pin connectors I take it? Those are pretty common with chargers. Of course, you can (make or) buy just about any type of connecting cable. Those little connectors are not the easiest to make yourself, they are compact and you'll likely need soldering but they are out there. I suggest to check ebay, chinese parts like that are dirt cheap (but it can take a month or 2 to get to you), and you can often buy a cable just to get the connector you need and then solder or crimp it to another one.
added: just did a quick google search out of curiosity. Used "12v connector power pin" and they came up right on the first page. Amazon and others. Pigtails, which are easier to deal with than just the connector alone. But check the current rating.