Reading the
producr page, that is what I see, a hard wired splitter.
"When monted, the Real Time Clock expansion module is connected to the aquabus (high speed) connector of the aquaero, the module itself features two aquabus (high speed) connectors for further expansion modules."
In case you are not aware, if you have the aquaero 6 XT connected to the motherboard with a USB cable, the clock module is not needed.