The Chelsea Academy graduate moves to the lower tier side after spending last season at Carshalton Athletic.
Pappoe left Chelsea after nine years without making a senior team appearance, spending most of his time on loan.
He also featured for Brighton and Hove Albion but failed to secure a permanent deal while on loan from the Blues.
The ex-Ghana U-20 player-led Chelsea's youth team to FA Cup glory as captain. Read Full Story
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