Wire ties or electrical tape will keep the wires tidy.  

9.  Reinstall the Seat Belt Reels

If you are installing a Deuce discard the factory spacers on the lower mounting bolts before you reinstall the seat belt reels.

10. Cut the Quarter Trim Panels
The panel was designed to clip into place from the side.  You've installed the bar in the way, so now you have to modify the panel so it slides in from the front instead of from the side. 

First cut the plastic dowel that goes into the side of the seat belt tower. 

A.  Next trim the lower flange.  You could remove the entire flange, but there's no need to remove anything in front of the bar.  It gives a much more finished look if you trim back slowly and leave the front of the flange.

The top of the panel has a hole for the seatbelt attachment.  You have to enlarge that area to fit around the upper mounting point of the bar.  This is the approximate shape you will need to remove or you can simpy cut a "U" shape is you have the right tools.  Then you can fine tune any tight spots as the trim panel slides back into place.