In my bots I like to have a main set of terminal points, 1 positive, 1 negative. I have these so that it becomes a lot easier to put new electrical components into the machine. I've used two methods in the past, both with their own merits, to create these terminals.

The first is a bolt mounted onto a plastic sheet with the bolt head recessed into the plastic. A nut is used to hold the bolt securely in place. The connections are then main using crimped ring connectors of the right size. These are stacked onto the bolt with a second nut securing them in place. I like this method because it has never failed on me (it was the same method used in typhoon 2). The only issue is that you have to find a way to insulate the rest of the bolt and connectors from shorting.

The second method I used most recently in boner was to use a solid bar of copper (about an inch long, 5mm by 5mm square) and solder all the connections onto this. This method worked well as there is little to no resistance between the connections and it can take huge currents. The problem is that adding or removing connections becomes a pain because I have to use my large soldering iron (100w+) to heat up the layer of solder on the bar.

To connect batteries or any other removable component I would recommend deans style connectors. Don't bother getting the official ones as they cost a small bomb. You can pick up cheap ones on ebay that do the same job at a fraction of the price.