When you load an Automap wrapped instance of Battery 3 the controls in Automap will be labeled 001, 002, 003 etc. These numbers correspond to the host automation ID numbers. To view the Battery 3 host automation settings select 'Automation Page' from the 'View' menu and then click on 'Host'. You can drag and drop host automation IDs onto any parameter in Battery to allow that parameter to be Automated.
Automap controls plug-in parameters using automation rather than MIDI data so if you want to control a parameter in Battery 3 from the ReMOTE SL you must first assign it to an Automation ID number in Battery using the drag-and-drop procedure. Once that is done you can learn that parameter to a control in Automap by activating learn mode, altering the plug-in parameter with the mouse and then operating the control that you want to assign it to. The control will then be labelled with the parameter name (e.g. cutoff) rather than the automation ID number.