A slow start to the week, tidying and fastening  wiring behind the O/S front wheelarch and drilling the holes to mount the cover for these.  I also checked all the electrical connections to the multicore and locked the screws with yellow paint.  The pace picked up a bit then, first by fixing the the cross link battery cable to the floor on the O/S, then completing the positive battery cable with a short length from the hidden isolator switch to the cab, securing it and the negative cable to the front bulkhead.  Next, I installed the control box, feeding all the low-current cables up the back of the control box and through the slot into their intended positions, then trimming and soldering tags for connections, alternately with working under the bus , where I secured the negative battery cable on the O/S and as close to the N/S as possible, both the propshaft and exhaust system obstructing access to the floor, but the cables are now safely out of their way and mostly secured along their lengths.   Continued soldering tags on the control box connections, the very hot weather makng it impossible to do much else.