What I did was copy a clock style from the HHC customizer folder (go to the file where you have HHC stored open it then open the file that says files and in there you wil find your clock files) to my desktop then opened the folder and changed the name for example in HHC it reads HH_HOME_0 this translates to reading in HHC as the number 0. What you need to do is change it read only 0 for S2U2. Change all of the numbers accordingly as far as making sure you have colons and am/pm you just shorten it to reflect the desired outcome ie HH_HOME_am becomes only a. After you have renamed everything just pull it from your desktop to your gfx folder in S2U2. Make sure that you name the folder appropriately. Inside of the S2U2 settings scroll down to clock font folder and scroll through the options which are clock\, clockH\ etc. make sure that you copy any of the original clocks that you might want to reuse to another folder to avoid being overwritten.
HHC.jpg S2U2 clock.jpg