This is a pic of the little do dads you will need.
Conduit Hanger w/speed thread size #0 3/8-1/2 5pk $1.90 HD
Thumb Screw 1/4 " 3pk $1.29 HD
Wing nut #10-24 4pk $1.29 HD
Round head slotted bolt #10-24 x 3/4 4pk $1.29 HD
Lock washers #10 18pcs.
Male/Female RCA cable (cut one side short aprox 3" for the light and The other long for the battery pack)
and a little toggle switch ..you don't really need it but it is nice.