How to configure custom header and footer in Scalpel/Foremost on Kali-Linux

I am working through some work exercises on file carving. Using a header of 0xDEADBEEF and a footer of 0xBEEFDEAD, I need to run the program to receive a specific token.

I have turned the header/footer into hexadecimal:

0xDEADBEEF = \x30\x78\x44\x45\x41\x44\x42\x45\x45\x46

0xBEEFDEAD = \x30\x78\x42\x45\x45\x46\x44\x45\x41\x44

I have enabled it in the config file but I am unsure if I am doing anything incorrectly, as I am yet to receive the token.

NONE        y        200000      \x30\x78\x44\x45\x41\x44\x42\x45\x45\x46         \x30\x78\x42\x45\x45\x46\x44\x45\x41\x44

Above is how I configured the config file.

Any help would be great! Thanks.