Abstract: An interposer includes a number of features that electrically and mechanically support a vertical mounted connector. The interposer includes multiple sets of contacts on a top surface. The contacts are arranged and/or adapted to contact respective pins of the connector when the connector is vertically mounted on the interposer. Each contact in each set of contacts is electrically coupled, using a trace, to a respective pad on the bottom surface of the interposer. The contacts, the traces, and the pads are arranged in a fan-out configuration. The interposer also includes a number of securement features that strengthen a mechanical connection between the connector and the interposer.