Troubleshooting a freeplay s360 not playing due to battery leak

I recently bought a freeplay s360 but it arrived doa upon further inspection it seams that the ni-mh batter had leaked and wicked down the wires to the back of the board. I have started cleaning and assessing what can be done to revive it but looking for some pointers.

I am aware that the spring mechanism is dangerous so have taken precautions while working with it ( I have and have repaired several of the larger models over the years,

Will upload pictures when I'm back at my work desk