Pins too close next to eachother

Hi,

I’m wondering if I might be doing something wrong here. I was planning to connect the Pisound Micro to the Raspberry Pi using a ribbon cable. For the duplicated pinout, I wanted to attach another ribbon cable going to my custom PCB, but there’s no way to fit two ribbon cables right next to each other. Even if I would use jumperwires for the second pinout, they wouldn`t fit really

My goal was basically to forward all the GPIO pins to my custom PCB. I’m aware that some of the pins are used by the Pisound Micro, and I don’t intend to use those on my custom board.

So basically I thought I can forward all raspberry pi pins through the pisound and then to my custom pcb.
Or does this approach not work in general?