A/ The transposon is shown in green with the terminal IRs in red. The target (which will be duplicated on insertion) is shown in black.                                             

B/ Single strand cleavage by the DDE enzymes generates a 3'OH group at each transposon end leaving the transposon attached at its 5' ends (non-transfered strand) to the donor DNA backbone. The 3'OH then  attack the target site as shown by the curved black arrows. Resolution of the resulting "Shapiro intermediate" structure by replication (not shown) generates a cointegrate molecule: a fusion between donor and target replicons with a directly repeated copy of the transposon at each junction.

C/ Two ways of dealing with the second (non-transfered) strand: using a second enzyme to liberate the transposon or use of the 3'OH to attack the opposite strand generating a hairpin intermediate.