US Patent 10276976 Card edge connector system

A card guide module includes first and second rail assemblies mounted to a host circuit board proximate to a card edge connector. The rail assemblies each include a rail body having a base mounted to the host circuit board and a track extending from the base receiving a circuit card. The rail assemblies each include a positioning member held in the track having a side positioning arm engaging a corresponding side of the circuit card to position the circuit card relative to the card edge connector. The first and second side positioning arms are configured to locate the circuit card therebetween.