Study the link I gave and follow it to the letter don’t forget to remove the jumper links on the speakers, and double check everything before turning on.
If you have two amps the same, and your speakers like you have that have mid/high speaker terminals and bass speaker terminals then vertical bi-amping is the way to go.
BTW: You need a Y adapter on the preamp left and right outputs
Like these https://www.ebay.com/itm/2pcs-RCA-Audio-Y-Splitter-Plug-1-Male-To-2-Female-Gold-Plated-Adapter-Connector/291217630582?hash=item43cdec6576:g:waoAAOSwxCxT7GNs
Cheers George
If you have two amps the same, and your speakers like you have that have mid/high speaker terminals and bass speaker terminals then vertical bi-amping is the way to go.
BTW: You need a Y adapter on the preamp left and right outputs
Like these https://www.ebay.com/itm/2pcs-RCA-Audio-Y-Splitter-Plug-1-Male-To-2-Female-Gold-Plated-Adapter-Connector/291217630582?hash=item43cdec6576:g:waoAAOSwxCxT7GNs
Cheers George