Attaching Heatsinks to Hoods

[gregzz4]

I've never built something like this, so Snaz is your better go-to for help

If it were me, I'd go with the removable brackets
Safer, and easy to remove for maintenance/repairs

I see 4 corners of your acrylic splash guard look like they have screws - or are they just some kind of pressed thingys ?
Could you remove the guard, drill the sink and mount it to those holes ?

If you were a bit closer I'd come look