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Lets assume you have two 20mm cubes, A is on the front and B is on the back of the built plate. Lets assume that Process1 for A. Leave that one alone.
On Process2 for B, you can insert on your starting script G1 X10 Y5 ( Y5 can be Y100 if you want head further back) and M0 on a new line. This will have the same effect.
remember that you cant have all the usual stuff on the starting script such as bed level, home axis etc, because it may crash into model A in the bed.
And also make sure the processes are sequential (of course since you asked for this)