AWR1243BOOST: Cascade mode not available on development board?

We're looking into synchronizing two AWR1243 modules. From the datasheet, it appears this is done by providing a 20 GHz clock signal from the master board through FMCW_CLKOUT or FMCW_SYNCOUT to FMCW_SYNCIN1/2 on the slave board. The schematics for the AWR1243BOOST, however, has nothing connected to these pins.

Is it correct that the AWR1243BOOST board does not expose the required connections to synchronize two modules and a custom board is required?

Thanks!