@Buck
You will need to adjust the Monitor patch in this screen – https://www.allen-heath.com/content/uploads/2023/06/Qu-Mixer-Reference-Guide-AP9372_10.pdf#page=74&zoom=auto,-274,799
From here, you can choose what channels you’re sending out to any ME system, so to send FX to one or more keys, you may need to patch FX instead of the default outputs.
The other (maybe better) option would be to send all the FX returns to an unused mix on the Qu, and then send this to the ME.
The ME500 automatically receives the first 16 mono or stereo channels, so you will need to ensure the FX or FX mix is within this range. For example, if the first 16 channels in the Monitor patch window are mono input channels (by default), then that will be all 16 keys used up. Instead you could have 14 mono input channels, then 15 and 16 stereo linked, followed by an FX mix (mono or stereo) and this would show up on key#16.
More information on how patched channels are assigned to keys is show in the ME500 user guide here – https://www.allen-heath.com/content/uploads/2023/06/ME-500-User-Guide-AP11137_1-1.pdf#page=12&zoom=auto,-274,516
Hope this helps!
Keith.
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