Best Practice to place InfoObject in model

Hi Gurus, I have this Z InfoObject that created to to hold values 1,2,3 and 4 to indicate quarters. I intend to use this in determining th quarter when a user enters a date on a query (like a formula). This cube is kind of a copy of "Actual and Budget" cube that SAP delivers. I wanted to place this 'Z' object n one of the dmensions and was having hard time on how i should determine where it should go? Any help would be appreciated.
Thanks.

I am sure you cannot add it to the TIME dimension.
If there is not any dimension that contains a close relation to the Quarter characteristic, fo ahead and create another new dimension and put it in there.

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