Not recommended. The AO-8 optical diameter is too small for the large 24mm x 36mm sensor size of the STL-11000M. Severe vignetting and positioning of the guide sensor will be a problem. AO-X is what is needed.
If I recall correctly, you need the MOAG-A for SBIG STL/AOL with the 2" STL adaptor. If you've already got the hardware, you could prototype it, but it really is not going to do the job.