Not 100% sure what you're asking here...but if It's what I think it is....

Run script 1 like this......

./Script1 Hello

In Script 1 - you have

nohup ./Script2 $1

Then script 2 is the same.

Why you would want 2 scripts here I'm not sure (but thismay just be for the example?)

If this really is your script - then you could just use

nohup ./Script2 Hello

Because all you are doing is running script2 in nohup and passing it the same variable. Up to you! (Not sure what you are actually doing with the variable though?)

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Pete