The Patch Bay (10 Mono) and Patch Bay (10 Poly) modules are the simplest of modules, providing 10 pass-through mono or poly connections (depending on the version used) which allows you to daisy chain two or more cables to match other signal paths for patches where sample-accurate synchronisation is needed. You can daisy chain the connections to achieve more than a single sample delay.
Currently, each cable connection in Voltage Modular introduces a one sample delay, so if you are timing things to the sample-level but have a module in the sequence on one path and none on the other, you can see sample offsets. These modules allow you to easily address this. You can also daisy chain the connections to achieve more than a single sample delay.