The Evo Converter plugs directly into a CARK-91 (used by the Nokia 6310i, 6310, 6210, 6150, 5110) and allows the kit to work with the new Pop-Port phones that use an MBC-15S holder such as Nokia 6230, 7250i, 7250, 6820, 6100, 6220, 7210, 6610, 3200, 3100.
The Evo Converter will fit exactly in place of the 6310i holder so there is no need for new holes or brackets.