Timber Connectors

I'm Attempting To Make A Raised Bed For Veg Growing, So There's No Need For It To Be A Work Of Art, But When I Put The Two Lengths Of Wood Together At A Right Angle Do I Fix The Connector Internally Or Externally Or Doesn't It Matter?
New Boots- I'm Only Doing A Veg Patch Because I've Had The Beef Scarecrow With Eyes Made From My Ball-bearing Collection For 3 Years ... You Are Moving House? Mazel Tov! *stunned @ News* :)