Get you some tie ups. Velcro is trash for Sparring. Use the other gloves for Bag and mitt work. That way it saves the padding on your gloves. Worst sparring I ever had was a nikka with Reyes gloves. Those shyts hurt. Any nikka i see use that those before we spar I automatically knew pull out the dirty shyt like wrapping a nikka up and cover his mouth with my gloves, use my elbow to lift his chin up etc.. all types of shyt lol.
With the sponge you use it the same way you would wrap you hands normally. After you wrap your wrist and thumb wrap your hand once. then put the sponge on top and wrap between your knuckle to hold it in place(like normal. Well I hope your ass is wrapping it that way anyway) once you go through your 3 fingers wrap it around the sponge then finish wrapping your wrist. Create that X on your wrist too. Keeps the wrist in place.
Edit:
Here's an example...
Once you get it down, do it how you feel comfortable... My bad for this long ass reply
naw this gospel repped king