I hate to say this But u should not touch that engine again if u managed this type break ; ) , otherwise the crankcase has some pressure in it so oil(real black stuff) will probably get vented all over. Try it with the tape - if it holds ok.
Probably just the plastic funnel. I broke it after I did the oil change (might have been too excited). Mine is red and the dealer in my area needs to order it for me next week. Right now, I used 3M all-weather duct tape. Luckily, it still holds after I drove for 2hrs.