engine harness replacement help

im looking to restore a 91 GS and i would like to get a new engine harness but i keep getting two diffrent part numbers. 32110-PR4-A51 and 32110-PR4-A10
whats the diffrence between them?

Ones for the manual and the other is for an automatic more likely

The 51 is for the automatic, the others for a manual.

thnk you sir :rockon: