Device Hacking Where to start

Please check out the picture.

Can anyone provide any feedback on where I can hack this to connect to an arduino?

Thanks!!!

Its a tens box

Do not double post.

Sorry to clog up your arduino forum feed jremington. just tryng to get some feedback for a school project.

campriest: Sorry to clog up your arduino forum feed jremington. just tryng to get some feedback for a school project.

Then keep it in one thread!

// Per.