register spn for load balancer 3rd party object

hello there

i'm trying to register spn for load balancer 3rd party object that i create in active directory
in advanced to use it for kerberos authentocation for my backend iis's servers application
i got a litle confused with that so i'm asking for assitance that needed
to doing it right when i register the spn to both iis servers application
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tnku

ravid ramirez