1989 XL600VK Transalpine Help/Questions

[Adonis.psa]

Greetings!

Questions below for my 1989 XL600V transalp, currently has a little over 17k miles and bought used (Pictures attached & forgive the dumb questions this is my first bike and trying to learn as much as possible w/ my Haynes manual acting as scripture)

1) Any tips for mounting aluminum hand guards? I have some bark busters I purchased. They were not “impossible” to attach but included clamps were scratching/not aligned with actual guards so I ended up taking them off

2) I couldn’t for the life of me find the rear brake fluid reservoir, I know different versions might have unique placements (87-89, 90s, etc) but I took off both side panels and couldn’t find anything at all. (Pictured is my bike, and then is the manual and literally NO reservoir to be found I am confused)

4) Any headlight substitute recommendations? Current light is fine but wanting to change/switch out sooner rather than later with a 1500 mile trip coming up after I’ve serviced everything (Light is a 5x7)

5) Oil type, manual says API grade “SE, SF, or SG” but those aren’t relevant in todays world if I’m not mistaken. Any recommendations with consideration to driving/operating in hotter temperatures? (90-115 degrees)

6) Generally any advice with operating older bikes + accessories specifically for this 89’ XL600V that anyone could recommend?

Thanks to all for reading bearing with me!