yep, its the name of the type of connector, there a good alternative to the banana type plugs (aka corallys) but in my opinion look a little messier but have the added advantage of not being able to plug in the wrong way (providing the connector has been soldered in the right way
)
used for connecting connecting the battery to the esc (speedo), battery has the female end and the speedo has the male end, which in most cases require you too solder the connector of your choice on, in your case if you have a deans connector on your battery you will solder a deans male onto the speed +/- wires to give you power. (
ensure you get these right its not good if you get them wrong)
Personally I prefer the corally connectors, I find them very hard wearing and have never had any problems plus I think they look a little tidier and more professional looking.