It's interesting, different species have different ways of getting established, some almost all only eat in a small, dark, confined space and others will mostly only start if you disturb them as little as possible, sneak the mouse in near their hide and leave them be for a few hours.
The House snakes in the main seem to be the latter type but after eating consistently for awhile, become much less shy.
Coco is used to eating in her viv but has passed the shy stage of eating and is now at the boldly enthusiastic stage, so you can probably feed her in any manner you chose.