I'm just going off what I can see in the pictures here but...

the relays look 'thrown under the bonnet' - why aren't they next to each other, screwed down and aligned perfectly?

then the red and black wires that go past the cone filter would be the same length and could be taped up to form their own loom.

same goes for all the wires that run from the battery area - they could all be the same length and taped up in their own loom.

The earth wire linking the two relays would also be much shorter and neater.

also the wires to the nos solenoids look like they are joined with crimp terminals - they'd be better soldered if at all possible.

and as said definitely use insulated terminals - if a relay moves or a wire comes astray you could have big problems! (although I assume its all correctly fused?)

if done properly and neatly you would only see two relays (perfectly mounted next to each other), one loom going to them and one going to the solenoids, all taped up and neatly fastened out the way.

seen as you are doing it yourself and not paying for labour charges you may as well spend as long as it takes to get it perfect!

and sort out the rest of the wiring 'nest' by the battery while you are at it!!