The SSSR Labs Mult 2×4 is a passive multiple module with switchable configuration: 2×4 or 1×8. This module has the smallest possible width: just 2hp that perfectly allows it to fit yet another gap in a modular synthesizer with a useful function.
The color coding helps the user to select the desired operation mode.
Black lines, the left switch position: Dual 4-terminal multiple.
Blue lines, the right switch position: Single 8-terminal multiple.