L200 system voltage?

I just picked up an L200 with in generally good condition with around 1,000 hours on it, I'm expecting this to be the first of many posts,

I had it delivered to my family homestead and I wanted to add a couple of LED work lights when I'm up there next, but I realized a machine this old could be 6v. Does anybody happen to know the system voltage on this tractor or do I need to take my multimeter with me and order a different day?

I'm definitely not going to modify the tractor. It was listed as an L210p because that's the service manual the owner had for it, when I went to test it I saw that it was actually an L200 and it didn't take long on google to realize it's a rare vintage model.

It has four holes on the fenders that appear to be from the factory, I was going to use those to bolt the lights on or put them. Alternatively I'm looking into a Kubota ROPS and wouldn't feel bad about drilling a couple holes in that for an overhead light bar. I hope the ROPS is a bolt-on but I'll weld if I have to. This machine feels pretty top-heavy on slopes and the manual transmission is a little more bossy than I'm used to on newer machines; it's a working machine and safety has to come first.