The xSIID uses a carrier board that slides into the tube in front of the antenna rod. The chip and LED are situated such that it “shoots out the side” of the glass tube…
The xLED is similar, but without a carrier PCB… the antenna wires are connected directly to the SMT pads of the LED and the LED can be positioned somewhat randomly inside… usually pointing out the side like the xSIID, but sometimes at a 45 degree angle and sometimes very closer to “shooting” out the domed cap of the glass.