Trans shift cable on 1999 Volvo S80

How is the best and easiest way to get to the bolts at the fire wall to replace the shift cable? I have already took part of the console at the shifter apart and took the cable loose at the shifter. And in the dash it says to service abs, how do you service abs. Do I replace the control unit? Thanks and God Bless.

Asked by for the 1999 Volvo S80
The ABS issue is possibly a control module issue, but it could be a sensor too so get the codes pulled from the ABS Control Module first to verify. Once you get the codes post them here and I can give more advice.
I'm not sure about the shift cable, I would have to see it. Why are you replacing teh cable?