I will be making a desk from 3/4" bamboo plywood that will need furniture connectors to attach the front to the top.

The front is basically a bookshelf, and the top is two sheets of plywood with drawers housed in-between.

The bookcase has two sides, a back, various shelves but no top - the sides and back just butt up against the underside of the plywood top.
What I need to get is a furniture connector to connect the bookcase to the flat of the plywood "subtop" so that I can assemble the desk at the client's home.

I cannot corrupt the surfaces of the bookcase.
So, if I make mortises on the top edge of bookcase sides and back and insert the connector this way I can bolt down through the desk "subtop".

The two legs on the other side of the desk from the bookshelf will be secured by custom metal brackets, T-nuts and bolts. But they don't want a stretcher from these legs to the bookcase.

This was designed by the client and the designer, and they are pretty much decided on this form. They don't understand furniture engineering, and have decided that once the desk is in it's home it won't get any rough treatment and will be fit for purpose.

Any advice on where to look for connectors will be appreciated.

If the above is confusing I'll add a drawing tomorrow.

thanks, Mark