All the above eight deities are inside the main quadrangle. There is a separate sanctum sanctorum for Lord Krishna on its north side. Krishna here is said to be in the company of His dear cattle and hence, the name.
The prayer is the same as used for Krishna everywhere which is:
“KrishNaaya vaasudevaaya haraye paramaalmane
praNata kLeSa naaSaaya govindaaya namo namah”
I prostrate before (namo namah) krishNa (krishNaaya) who is the son of vasudeva (vaasudevaaya), who is also known as hari (haraye), who is the ultimate reality (paramaalmane) and who is the protector of cattle (govindaaya) for the destruction of all my troubles (praNata kLeSa naaSaaya). ‘L’ is used for the last ‘La’ occurring at the end of the alphabets, before ‘ksha’.