Within the WICED SDK, take a look in the DOC/Schematics folder.
You will find the PDF schematics for all of the evaluation platforms in this location.
If you are referring to the Broadcom board, I beleive they are in the 'doc' folder under schematics.
If you are interested in the ACKme WICED development board - the snapper (ACKme | AMW004-E01 (Snapper)), then these are only published to qualified customers (meaning you have spoken to us).
Our other boards are however published at: ACKme | Resources