Better late than never heres some tips on fitting that may help someone
hey mate heres some pics and measurements hope there still helpfull, havent even had a chance to log in the last week
on the inside the hole is 340mm back from where the hoodlining starts and if measuring on the roof its 315mm back from the front of the roof
one more thing i didnt properly shape that piece i glued inside to support the roof so when i tihtened the screws it pulled that part of my roof flat if you look at it on the outside, so take your time and curve it properly and it will come up better than mine and keep the curve of the steel
Never fitted a relay just used alligator clamps to the battery so i only hook it up when using it also used push on connectors on the roof so i can take the light off the roof in a couple of minutes