Stripping Jimny's interior - what do install

Since the bottom of my trunk (where the car lift and the triangle sit) is badly rusty, I am planning to take the car to remedy it.
The whole rear interior of the car will be stripped, and any rusted sections will be cut, welded and repainted.
While I am at it, I might also strip the front part of the interior, as one of my front speakers has sporadic loss of connectivity.

So, I am now thinking what could I do and improve and sort out while the car is already "naked" inside?

I was thinking about doing this:

1. Connect the electrics to the towbar which I installed during the last spring;
2. Install both rear speakers;
3. Install a 12V "cigarette" socket in the rear boot, connected directly to the main fuse box;
4. Change the front speakers for something of higher quality;
5. See if I could remedy driver's seat belt - it hardly retracts back after disconnecting it;

6. Anything else? Any ideas?
7. Are there some specifics to watch out when stripping Jimny's interior? If there are, I would like to point them out to the guys who will do the stripping, to avoid and tears and breaks of interior plastics, holders, carpets etc.

My Jimny is a facelift model 2005-2012.


8. Anything else?

Rear interior lights would be a good idea.

depending on what you want to do with it, i would also drill some holes in the plastic trim and install some fixation points for ropes or straps to secure tools and bagage, just in case you feel adventurous.
as far as what's on your list, i think you're only missing the rear interior lights.
also, the diesel jimny can be tricky if you want to install a second battery cuz there's not enough room under the bonnet, so maybe getting just the battery tray welded to the boot floor just in case you want to add stuf like a winch or something.
and maybe a work spotlight in the rear upper corner of the car for night drives in the woods.
also, and this is a simple one that i'm gonna do as soon as i can, install a hand rest for the driver. sure, the big plastic handle in the roof like in the passanger's side and the rear seats is a problem in the bumps or in a crash as your head will prolly hit it, but if you take out the plastic studs, get a nylon or leather strap and use some screws (the holes are there) to get it in place you'll be just fine.
personally, i would love to strip mine and zombie proof it, get rid of the plastic, get some aluminium or diamond plate and just screw it in. would be much simpler to get a screw drive and take the plates of to get at the inwards of the car than to deal with the plastic trim. that and weld attachement points on the inside for securing spares,tools and stuff more akin to a expedition truck than a pavement princess. but i'm guessing the wife wouldn't like it lol

Thank you both very much for the suggestions. I am taking my Jimny to a "stripclub" on Monday to have it remedied and rust-proofed, and I'll do some of these suggestions in the process.

I'll definitely lay three pairs of cables from the front end of the car to the rear boot, to have them for future use (interior boot light, exterior spot light, USB charger, etc.).