How to enter sec 1245 property in asset worksheet?

The Asset Entry Worksheet has letters in the dropdown for the various asset classes.  Which one do I choose to enter Sec 1245 property?  I have a Delaware Statutory Trust investment and the assets are broken up into four classes:  Land [no deprec];  Buildings [Type I, 27.5 yrs. MACRS];  Land Improvements [Type H, 15-yr MACRS];  and the fourth group is "Sec. 1245 property items (generally attached to the building) that qualify as real property for 1031 exchange purposes but have a 5 year life for depreciation purposes."

 

So I must enter the latter three assets (excluding the land) in three different Asset Entry sheets, right?  The first two are not a problem, but I need help determining which TTax letter (A, B, C, D, E1, E2, J1 thru J6, etc.) I should specify for the Sec. 1245 property.  Making a bad guess will screw up the calcs for this asset and cause aggravation when I sell.

 

Thanks!