Here's how to thread the Tank Band System to most BCDs
1. Start with the metal bale as close to the pack frame as possible. This provides the greatest range of adjustment.
2. With the buckle fully open, thread the cylinder band up the middle slot and back down through the slot closest to the metal bale (Figure 1 and 3). Pull the end to increase the tension in the band.
3. Close the buckle halfway to prevent the webbing from slipping and thread the webbing through the open slot in the end of the buckle (Figure 2 and 3).