The bulbs are connected directly (ZHA mode)
For mapping, I basically followed this guide… FAQ: Mapping your ZigBee network with Digi's XCTU
With the Hue bulb powered on the multisensor connects to it and it shows up on the map as a signal 1 way from repeater to endpoint. e.g. 200/?
With the bulb powered off it connects to the ST outlet as a repeater and it shows a signal the other way e.g. ?/200
The sensor is only available to ST when connected via the outlet although in either case it shows up on the map 