A mapping document describes the relationships between input and output channels.
Probe maps are organized by Probe Package, as each may be different. Always check with the settings in your acquisition systems to make sure that the maps are properly decoded in your software.
Adaptor maps are necessary to convert the Probe package pin-out to the adaptor pin-out.
Some Probe packages have customizable wiring configurations to enable various ground and reference connections. NeuroNexus probes are designed for maximum flexibility, as recording setups vary greatly from lab to lab.