Hi and welcome to HC! Congrats on giving Biscuit his forever, loving home with you.
I would not worry if he decides to eat directly from the bowl rather than storing it in his nest or house. Some hams prefer to do this always, some alternate between doing this sometimes and hoarding it other times, and some prefer to always take their food to their nests for future nibbling there. Regardless of whatever choice your ham decides to do at the moment, all options are absolutely fine and nothing for you to be concerned about so long as they are eating. The only items of food that should not be brought back to their nest or house are those that are fresh such as fresh veggies, etc. Those foods could get rotten if hidden away and not eaten in a timely manner.