The wholesale is in product_prices.tpl. The code that inserts it in product.tpl it this
Code:
{if $product.forsale ne "B"}
<tr>
<td colspan="2">
{include file="customer/main/product_prices.tpl"}
</td>
</tr>
{/if}
It creates new row in the details table. You can create new column in the details table and insert that code in it
Code:
{if $product.forsale ne "B"}
{include file="customer/main/product_prices.tpl"}
{/if}