When bringing things together, I tend to go with 'Source' and 'Target'.  I use 'Source' and 'Destination' when copying (programming thing, you know), but that might work.  'Projectile' and 'Target' would be more appropo, but only if we're talking ballistics. ;)

C makes it easy to shoot yourself in the foot. C++ makes it harder, but when you do, you blow your whole leg off.

 -- Bjarne Stroustrup

Contact Me | Kuroyume's DevelopmentZone