Stereo A/B/AB switch box

[scarfoot88]

Hi,

I have a Helix LT that I have connected to my monitors through the headphone port and a FRFR through the momo line out port. This is a bit tedious when I want only one or the other cos I need to manually disconnect the cables. I am hoping to build a AB box out of an altoids tin I have. But I am not able o find any proper schematics on how to do it for a stereo in and stereo out. I am looking to build it as a passive build. Any help would be appreciated.

Thanks!