I would strongly recommend not using an STA. There is no provision for protecting your back from the bolts in a Transpac. The stabilize plates are only for use with doubles.
Unfortunately they are really designed to be used with the crosshair design of the Dive Rite wings and the crosshair on all of their wings is actually there specifically for the Transpac.
I would not use sex bolts to attach wing to the Transpac and then try to hold the tank with the wing. The wing is not structurally sound enough to support a tank for any length of time. The transpac won't care, but you will likely rip that center panel out in a couple of dives from the dynamic stresses of entry/exit/walking around.
I do not believe there is a way to get this to work properly without cutting the wing. Your best bet is to find a used Dive Rite Travel wing and use the system as designed. The Dive Rite wings are designed to actually trap the crosshair with the cam bands so if you wanted it to work properly you would have to hot knife both the narrow section and the wider section but best to just get a Travel wing.