RCA VMT390 - Belt Replacement

[user181]

I have an RCA VMT390 VCR which hasn't been used in 10-11 years, and it was acting somewhat intermittently at that time. So, I and am going to replace the belts just as a matter of course. I have the factory service manual and I bought a belt kit on eBay. The belts are not marked or identified & didn't include an info sheet, and the eBay seller wouldn't/couldn't provide me with this information.

I am a newbie at VCR service, and am requesting your advice & guidance on belt replacement. Should I just eyeball what belt should be used in what spot, or is there a more scientific way to do this? When you guys get belt kits, is it typical for them to not be identified?

Thanks!