A alignment system is described for a blocking member for the transfer of seed from a seed meter with a seed meter housing to a delivery system with a delivery system housing. The blocking member may have a blocking face adjacent a seed path of the seed meter, the blocking face opening to a seed passage, and the seed passage extending through the blocking member to an interface with the delivery system housing. A first recess may be included on the blocking member, and a second recess may be included on the delivery system housing. When the seed passage of the blocking member is correctly aligned with the delivery system, a protrusion on the delivery system housing may be configured to seat firmly in the first recess and a protrusion on the seed meter housing may be configured to seat firmly in the second recess.
