Hi,
You dont want to install pumb on bay res or anything that is closely connected to your case, if pump noice is what you want to avoid.
Best solution what i have found so far is " Phobya noice destructor v.1 " , there migth be similar products on your shop, but thats only one in here that i found..
I dont use that secend glue mat on floor side, so the pump can like hover and not be connected to case. I allso try to not use too short tubes betwean pump and components so the tube dont transfer vibration so much.
Yeah its ugly but its best that i found if you hate more noice then bad looks.