This axle is from the Fumotec B4206 4x4 tractor kit
http://www.fumotec.de/modelle/dumper/index.php
No right or left motor, but rather how each esc is initially programmed, one esc 'normal', the other 'reversed' so they both run same direction.
These particular powered axles are using brushless motors on planetary gearheads & each motor has to have its own esc. If the motors were brushed, then you could use one esc to power1 or 2 or 3 paired motor axles or whatever the Amp limit of the esc is.
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