Multiple Merge Statement Issue

i have datatable having 10 column, send it as a parameter in stored procedure, now i want to implement merge statment on 2 different tables (Table1 and Table2 and source data is my datatable) on same stored procedure.

My Source datatable contain column like c1,c2,c3,c4...c10.

My Table1 contain column c1,c2,c3

and Table2 conatin column c4,c5,...c10