As a generalisation hydraulic lines were brown,black or aluminium. Pneumatic hoses black. Electric wiring yellow.
Here's a view into the port weapon bay. The weapon has been removed.
The cannon would face to the left the ammunition fed from boxes within the fuselage,at the top of the picture (infront of the electrical gubbins). Casings and links were ejected via the chute at the bottom left of the picture. The EDSK-1 electrical distributer box would probably be black,the wiring yellow.
Here's a view into the wheel well.
The top of the main gear leg is just visible at top right. The radius arm has the wiring running down it and the black circular device in the spar is the electrically driven actuator,a rotating drive,for raising and lowering the gear.
Here's another view.
The leather clad arm to the right of the rotating drive,attached opposite the radius strut,is a sealed air jack. It was pressurised to 1400psi and spring loaded. It served,along with gravity,to lower and hold down the gear in the event of an electrical failiure.
There really isn't a lot inside the wheel well. You can muck it up a bit with a wash,make it look like a bit of oil or other fluids have got in there but that's about it.
Cheers
Steve