Which way do I install the battery in a 1990 Yamaha ventureroyale 1300

"Hi @peter99 ,

Here’s a link to the owner manual.

Scroll to Sect. 9.49 - 9.50. There are images and diagrams that may be of some help.

Here’s also an image taken from this link, that may also be of some help.

(click on image to enlarge for better viewing)

The above links were found on this website."