What you call boot logo is the splash screen: you still have the VTi one because OBH backups haven't the BH splash screen stored (there is no OBH specific one: the installation files of OBH contain the traditional BH splash screen).
So, you need to take this splash screen from an image installation file, unzipping it.
It is located in the most internal folder of the structure and it's named
splash_auto.bin
Put it into a flashdrive with the usual structure for the flash.
For instance, if your box is a Solo4K, it must be within the folder
/vuplus/solo4k
Then flash as usual; only you'll be flashing only this file. But mind to create the whole structure for flashing, as I wrote.