The side sills are U-shaped profiles with openings for cables

Here is a Lionel 11341 634 Space-Prober Diesel Fraight Set

Part of Lionel's Collegiate Football series

Model Number: 2562

Athearn 7105 HO Great Northern Western Fruit Express Reefer #8885 ProductID_12489095 The side sills are U-shapedThis is an Athearn 7105 Great Northern WFCX 8885 Reefer Car. It features intricately realistic details, couplers, trucks, and plastic wheels. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Athearn Model Number: 7105 Road Name: Western Fruit Express (WFEX WFBX WFEX RBWX) MSRP: $14. 99 Scale Era: HO Scale Model Type: Freight Cars The Trainz SKU for this item is P11593427. Trainz Product Id: 11593427