The 28 year-old has played over two-hundred games for the Thames Estuary Galacticos and Leyton Orient also played against The Shots in the friendly against Portsmouth earlier in the month while on trial with the South Coast based side.
The signing has been made to offer cover for Jamie Young whilst Ross Worner continues his rehabilitation following his back injury.
Morris has been given the squad number of 29 and will be available for selection in tomorrows League Two opener at Plymouth.
Source: FOOTYMAD
