The forum post you are referring to is giving an example of user to asset relation. In your case you are doing an Asset to asset relation with server A and server B. Below is a report that will show the relation between two assets that are using the 'Replicating To' relation type (relation type we created manually). You just have to replace the highlighted relation type with the one you want to display in your report.
Instructions for adding the report below to your Lansweeper installation can be found
here.
Select Top 1000000 tblAssets.AssetName,
tsysAssetTypes.AssetTypename,
tblAssets.IPAddress,
tsysAssetRelationTypes.Name As [Relation Type],
tblAssets1.AssetName As [Child Asset],
tsysAssetTypes.AssetTypeIcon10 As icon,
tblAssets.AssetID,
tblAssets1.IPAddress As [Child IP Address]
From tblAssets
Inner Join tblAssetCustom On tblAssets.AssetID = tblAssetCustom.AssetID
Inner Join tsysAssetTypes On tsysAssetTypes.AssetType = tblAssets.Assettype
Inner Join tblAssetRelations
On tblAssets.AssetID = tblAssetRelations.ParentAssetID
Inner Join tsysAssetRelationTypes On tblAssetRelations.Type =
tsysAssetRelationTypes.RelationTypeID
Inner Join tblAssets tblAssets1 On tblAssets1.AssetID =
tblAssetRelations.ChildAssetID
Where tsysAssetRelationTypes.Name Like 'Replicating To%' And
tblAssetCustom.State = 1