Best way to attach rod holders to outside 2520XL Transom?

transom mount rod holders, bulkhead rod holders

TACO Marine 4-Rod Transom Mount Rack TACO Marine

Attaching Rod Holders To Transom with no rear Access - The Hull Truth - Boating and Fishing Forum

2005 PARKER 2820 xl

How-To Install Rod Holders on Fishing Boat

transom mount rod holders, bulkhead rod holders

Easiest Boat Rod Holder Install Ever – Plusinno

Easiest Boat Rod Holder Install Ever – Plusinno

2002 Parker 2520 Xl Sport Fishing for sale - YachtWorld