Use the Wireless Starter Kit to evaluate Silicon Labs' Bluetooth modules (BGM1xx), Zigbee-enabled modules (MGMxxx), and Wireless SOCs (EFR32xG). This Wireless Starter Kit consists of a main board (motherboard) and a radio board (child board), and there are several radio boards available for different module and SOC product numbers and radio frequencies.

Schematics, bill of materials and layout diagrams for this main board (BRD4001A) are readily available from Simplicity Studio.
On the Simplicity Studio top (launcher) screen, add the model number (BRD4001A) of the main board you want to refer to to My Products.
Then under the Documentation tab under Schematic and Layout Files you will find the Assembly Drawing, Bill of Materials and Schematic.

The figure below is when the main board (BRD4001A) is selected in My Products.