This invention relates to apparatus for connecting a battery plate to a metal strap or post or to moulds therefor. In contrast to existing arrangements lead is fed to the feed passage 17 via an opening 20 which is positioned immediate the ends of the aligned cavities in the set 14 of the mould. This arrangement enables the cavities to be fed with lead at approximately the same time and hence the dip of the lugs into the cavities can be optimised without any significant difficulties. In itself this substantially increases productivity. It has also been found that up to three batteries can be cast simultaneously, particularly if bypasses 16c are used for fine tuning the lead supply.