Silly me

I made a big mistake putting 2 new feet on the rear of my Kemper Stage - the replacement screw on the right hand side seems to have damaged the input jack.

I can still use it by plugging my guitar into the Return 1 jack but I'd like to get it back so I can use the normal input jack.

I'm quite good at soldering but I've looked and it's not obvious how to get inside the thing, can anyone help here?

Unfortunately I am in not in a position to send it for repair as I gig most weekends with the Kemper - it doesn't matter, it still works fine using the Return input jack.