Boozy Shirley temple cake

I am going to be making a Shirley temple cake for my partners birthday and want to make it boozy, but I don’t drink (no particular reason why). It was suggested to me to use rum, but I’m not sure which one to use or if there is a better option for alcohol. Does anyone have any thoughts? I am using this recipe: https://www.thecountrycook.net/shirley-temple-poke-cake/