Telect's 600CB08 power panel uses various load straps based on whether single, double or triple pole breakers are being installed.
600CB08 Load Strap Part Numbers:
Single pole : N/A (Built onto the chassis)
Double pole : 600CB082PK (for 5/8" on center lugs)
Double pole : 600CB08RPK (for 1" on center lugs)
Triple pole : 600CB083PK
Cover kit : 600CB08-MPK (Extended cover required when using Double or Triple-Pole load straps and breakers)