Can the credenza go on either side?

Can the credenza go on either side?---Yes, the credenza can go on either side.

The desk surface has a high gloss, is it glass or some other finish? Are there provisions for routing/hiding computer cables inside the desk?

The desk surface has a high gloss, is it glass or some other finish? Are there provisions for routing/hiding computer cables inside the desk?----It is high glossy but not the glass. There is n routing/hiding computer cables on the side table not the top.