Need some photos one of the thickest 2 should be red and go right down to the starter that would be the + .
The second thickest should go to the engine block, that's the - negative.
And most of the smaller wires should go to accessories and probably one goes to the main fuse block, they would be on the positive side +. I think there maybe a small wire on the negative side, if in question just put an ohmmeter on the block a good ground and make sure it reads 0 zero ohms to the - negative wire for the battery disconnected, do not connect anything to the battery till your sure it's right. And connect the negative last, you don't want to have the negative on and put the positive side on you'll probably fry some sensors and you could accidentally hit a ground with the wrench and we will call you sparky.
But all seriousness, with the ohm meter check all the smaller wires your not sure of, if you have 0 zero ohms resistance it is most likely a ground and goes on the - negative side, and if you have some resistance like more than 1 ohm, it's most probably something in a circuit that needs to be powered so yes that would go on the positive + side. Only use the ohmmeter if you can't trace it.
Look in idk s signature page, he's a good member here, has helped me a lot, and you will find a lot of info. A manual's and wiring diagrams. I understand decosse another member here is an electrical wiz. So maybe you'll get lucky and sum up the God's. I just had basic electricity in HS but I think the ohmmeter thing is right


Don't worry, you'll find out once you hook up to the battery sparky, well I hope not, and everything should have a fuse on the positive side

But yeah photos of exactly how many wires you have hanging unconnected would be very helpful, and while everything is off you might want to take a wire brush to it and knock off the fuzz, crud, whatever you want to call it, usually corrosion and add a lot of dielectric grease before putting it back together, it will help tremendously in getting more consecutive starts

GL
I think I only have a total of 3 and one is for an added fuse block from the previous owner, he added a horn and had some kind of problem hooking up the LED headlight, I'm afraid of the day I have problems with it, I try to stay away from it

. If it ain't broke, don't fix it

When you figure it all out you may want to tie the wires together with a wire tie, those things are great, didn't have those in HS. What will they think of next???


All kidding aside, sorry I couldn't help myself, GL
Here's the diagram from my manual for 2008-2016, but it shouldn't be much different, I would think if you have that many wires to the battery there's some custom add-ons that won't be on any diagram. Hope this helps, and did I mention I'm not a mechanic by trade, but by necessity, can't afford a real one. It cost me $900 to the shop that put my tires on

so don't be sparky, be careful, these parts aren't cheap and take time to get from the UK.