[bigblock73]

Here is a picture of a blank one mocked up in forum member Torchlight's truck. As you can see, these fit tight to the B-pillar and rear cab wall. Because he has not picked his speakers out yet, he opted for a blank pair...and until the hole is cut for the speaker opening, the shop mounted the floor bracket to the front side due to lack of access to the rear (where these are designed to mount)