The MultipleMotor is a Tango class that moves several motors in parallel. Here is an example from P10. Each of girderx and girdery move 2 motors:
Here are the lines from /online_dir/online.xml which introduce the motors to Online:
<hw> ... <device> <name>girderx</name> <type>type_tango</type> <module>motor_tango</module> <device>p10/multiplemotors/opt.02</device> <control>tango</control> <hostname>haspp10opt:10000</hostname> </device> <device> <name>girdery</name> <type>type_tango</type> <module>motor_tango</module> <device>p10/multiplemotors/opt.03</device> <control>tango</control> <hostname>haspp10opt:10000</hostname> </device> ... </hw>