Please help me to correct my sentences

Hi Teachers,

Please look at the sentences below and advise me which one is grammatically correct and appropriate one?

Attached are the images of items which thought it to be kept separately for the shipment. They haven't told us anything about this; otherwise we would have identified and kept them separately.

Attached are the images of items which seem to be kept for the shipment. They haven't told us anything about this; otherwise we would have identified and kept them separately.