Nope. Sry.
SAP DBTech JDBC: [1281]: wrong number or types of parameters in call: Param_2 is not bound: line 1 col 15 (at pos 14)
I guess - if a solution exists - is the create procedure statement where the parameter can be filled with a default value or marked as optional like
CREATE
PROCEDURE mySchema.MyProcedure(IN Param_1nvarchar(100):= '', IN Param_2 nvarchar(100) := '', [...])